diff --git a/app/Http/Kernel.php b/app/Http/Kernel.php
index ff56c8f9..cadc8cd7 100755
--- a/app/Http/Kernel.php
+++ b/app/Http/Kernel.php
@@ -15,6 +15,7 @@ class Kernel extends HttpKernel
      */
     protected $middleware = [
         \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
+        \Spatie\Pjax\Middleware\FilterIfPjax::class,
     ];
 
     /**
diff --git a/composer.json b/composer.json
index 074a2475..962161ae 100755
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,8 @@
         "jlapp/swaggervel": "dev-master",
         "doctrine/dbal": "~2.3",
         "zizaco/entrust": "5.2.x-dev",
-        "prettus/l5-repository": "^2.6"
+        "prettus/l5-repository": "^2.6",
+        "spatie/laravel-pjax": "^1.3"
     },
     "require-dev": {
         "fzaninotto/faker": "~1.4",
diff --git a/composer.lock b/composer.lock
index fe0b73f8..40a89203 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "e5d6a4a09e901eae8c895fe8c97979cc",
+    "content-hash": "528d419a11eb2963be54a289afa2fbbc",
     "packages": [
         {
             "name": "barryvdh/laravel-ide-helper",
@@ -2003,6 +2003,58 @@
             ],
             "time": "2017-03-26T20:37:53+00:00"
         },
+        {
+            "name": "spatie/laravel-pjax",
+            "version": "1.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/laravel-pjax.git",
+                "reference": "30e1509517a6371a5774a29e99e2db204cb7fc5b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/laravel-pjax/zipball/30e1509517a6371a5774a29e99e2db204cb7fc5b",
+                "reference": "30e1509517a6371a5774a29e99e2db204cb7fc5b",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/http": "^5.1",
+                "illuminate/support": "^5.1",
+                "php": "^5.5.0|^7.0",
+                "symfony/css-selector": "^2.7|^3.0",
+                "symfony/dom-crawler": "^2.7|^3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "4.*",
+                "scrutinizer/ocular": "~1.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Spatie\\Pjax\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Freek Van der Herten",
+                    "email": "freek@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A pjax middleware for Laravel 5",
+            "homepage": "https://github.com/spatie/laravel-pjax",
+            "keywords": [
+                "laravel-pjax",
+                "pjax",
+                "spatie"
+            ],
+            "time": "2016-02-18T15:16:46+00:00"
+        },
         {
             "name": "swiftmailer/swiftmailer",
             "version": "v5.4.8",
@@ -2291,6 +2343,62 @@
             "homepage": "https://symfony.com",
             "time": "2017-06-01T21:01:25+00:00"
         },
+        {
+            "name": "symfony/dom-crawler",
+            "version": "v3.1.10",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/dom-crawler.git",
+                "reference": "7eede2a901a19928494194f7d1815a77b9a473a0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/7eede2a901a19928494194f7d1815a77b9a473a0",
+                "reference": "7eede2a901a19928494194f7d1815a77b9a473a0",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5.9",
+                "symfony/polyfill-mbstring": "~1.0"
+            },
+            "require-dev": {
+                "symfony/css-selector": "~2.8|~3.0"
+            },
+            "suggest": {
+                "symfony/css-selector": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.1-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\DomCrawler\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony DomCrawler Component",
+            "homepage": "https://symfony.com",
+            "time": "2017-01-21T17:13:55+00:00"
+        },
         {
             "name": "symfony/event-dispatcher",
             "version": "v3.3.2",
@@ -4624,62 +4732,6 @@
             "homepage": "https://github.com/sebastianbergmann/version",
             "time": "2016-10-03T07:35:21+00:00"
         },
-        {
-            "name": "symfony/dom-crawler",
-            "version": "v3.1.10",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/dom-crawler.git",
-                "reference": "7eede2a901a19928494194f7d1815a77b9a473a0"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/dom-crawler/zipball/7eede2a901a19928494194f7d1815a77b9a473a0",
-                "reference": "7eede2a901a19928494194f7d1815a77b9a473a0",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.5.9",
-                "symfony/polyfill-mbstring": "~1.0"
-            },
-            "require-dev": {
-                "symfony/css-selector": "~2.8|~3.0"
-            },
-            "suggest": {
-                "symfony/css-selector": ""
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "3.1-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Component\\DomCrawler\\": ""
-                },
-                "exclude-from-classmap": [
-                    "/Tests/"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony DomCrawler Component",
-            "homepage": "https://symfony.com",
-            "time": "2017-01-21T17:13:55+00:00"
-        },
         {
             "name": "symfony/yaml",
             "version": "v3.3.2",
diff --git a/public/vendor/pjax/jquery.pjax.js b/public/vendor/pjax/jquery.pjax.js
new file mode 100644
index 00000000..d57269d4
--- /dev/null
+++ b/public/vendor/pjax/jquery.pjax.js
@@ -0,0 +1,903 @@
+/*!
+ * Copyright 2012, Chris Wanstrath
+ * Released under the MIT License
+ * https://github.com/defunkt/jquery-pjax
+ */
+
+(function($){
+
+// When called on a container with a selector, fetches the href with
+// ajax into the container or with the data-pjax attribute on the link
+// itself.
+//
+// Tries to make sure the back button and ctrl+click work the way
+// you'd expect.
+//
+// Exported as $.fn.pjax
+//
+// Accepts a jQuery ajax options object that may include these
+// pjax specific options:
+//
+//
+// container - String selector for the element where to place the response body.
+//      push - Whether to pushState the URL. Defaults to true (of course).
+//   replace - Want to use replaceState instead? That's cool.
+//
+// For convenience the second parameter can be either the container or
+// the options object.
+//
+// Returns the jQuery object
+function fnPjax(selector, container, options) {
+  options = optionsFor(container, options)
+  return this.on('click.pjax', selector, function(event) {
+    var opts = options
+    if (!opts.container) {
+      opts = $.extend({}, options)
+      opts.container = $(this).attr('data-pjax')
+    }
+    handleClick(event, opts)
+  })
+}
+
+// Public: pjax on click handler
+//
+// Exported as $.pjax.click.
+//
+// event   - "click" jQuery.Event
+// options - pjax options
+//
+// Examples
+//
+//   $(document).on('click', 'a', $.pjax.click)
+//   // is the same as
+//   $(document).pjax('a')
+//
+// Returns nothing.
+function handleClick(event, container, options) {
+  options = optionsFor(container, options)
+
+  var link = event.currentTarget
+  var $link = $(link)
+
+  if (link.tagName.toUpperCase() !== 'A')
+    throw "$.fn.pjax or $.pjax.click requires an anchor element"
+
+  // Middle click, cmd click, and ctrl click should open
+  // links in a new tab as normal.
+  if ( event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey )
+    return
+
+  // Ignore cross origin links
+  if ( location.protocol !== link.protocol || location.hostname !== link.hostname )
+    return
+
+  // Ignore case when a hash is being tacked on the current URL
+  if ( link.href.indexOf('#') > -1 && stripHash(link) == stripHash(location) )
+    return
+
+  // Ignore event with default prevented
+  if (event.isDefaultPrevented())
+    return
+
+  var defaults = {
+    url: link.href,
+    container: $link.attr('data-pjax'),
+    target: link
+  }
+
+  var opts = $.extend({}, defaults, options)
+  var clickEvent = $.Event('pjax:click')
+  $link.trigger(clickEvent, [opts])
+
+  if (!clickEvent.isDefaultPrevented()) {
+    pjax(opts)
+    event.preventDefault()
+    $link.trigger('pjax:clicked', [opts])
+  }
+}
+
+// Public: pjax on form submit handler
+//
+// Exported as $.pjax.submit
+//
+// event   - "click" jQuery.Event
+// options - pjax options
+//
+// Examples
+//
+//  $(document).on('submit', 'form', function(event) {
+//    $.pjax.submit(event, '[data-pjax-container]')
+//  })
+//
+// Returns nothing.
+function handleSubmit(event, container, options) {
+  options = optionsFor(container, options)
+
+  var form = event.currentTarget
+  var $form = $(form)
+
+  if (form.tagName.toUpperCase() !== 'FORM')
+    throw "$.pjax.submit requires a form element"
+
+  var defaults = {
+    type: ($form.attr('method') || 'GET').toUpperCase(),
+    url: $form.attr('action'),
+    container: $form.attr('data-pjax'),
+    target: form
+  }
+
+  if (defaults.type !== 'GET' && window.FormData !== undefined) {
+    defaults.data = new FormData(form)
+    defaults.processData = false
+    defaults.contentType = false
+  } else {
+    // Can't handle file uploads, exit
+    if ($form.find(':file').length) {
+      return
+    }
+
+    // Fallback to manually serializing the fields
+    defaults.data = $form.serializeArray()
+  }
+
+  pjax($.extend({}, defaults, options))
+
+  event.preventDefault()
+}
+
+// Loads a URL with ajax, puts the response body inside a container,
+// then pushState()'s the loaded URL.
+//
+// Works just like $.ajax in that it accepts a jQuery ajax
+// settings object (with keys like url, type, data, etc).
+//
+// Accepts these extra keys:
+//
+// container - String selector for where to stick the response body.
+//      push - Whether to pushState the URL. Defaults to true (of course).
+//   replace - Want to use replaceState instead? That's cool.
+//
+// Use it just like $.ajax:
+//
+//   var xhr = $.pjax({ url: this.href, container: '#main' })
+//   console.log( xhr.readyState )
+//
+// Returns whatever $.ajax returns.
+function pjax(options) {
+  options = $.extend(true, {}, $.ajaxSettings, pjax.defaults, options)
+
+  if ($.isFunction(options.url)) {
+    options.url = options.url()
+  }
+
+  var hash = parseURL(options.url).hash
+
+  var containerType = $.type(options.container)
+  if (containerType !== 'string') {
+    throw "expected string value for 'container' option; got " + containerType
+  }
+  var context = options.context = $(options.container)
+  if (!context.length) {
+    throw "the container selector '" + options.container + "' did not match anything"
+  }
+
+  // We want the browser to maintain two separate internal caches: one
+  // for pjax'd partial page loads and one for normal page loads.
+  // Without adding this secret parameter, some browsers will often
+  // confuse the two.
+  if (!options.data) options.data = {}
+  if ($.isArray(options.data)) {
+    options.data.push({name: '_pjax', value: options.container})
+  } else {
+    options.data._pjax = options.container
+  }
+
+  function fire(type, args, props) {
+    if (!props) props = {}
+    props.relatedTarget = options.target
+    var event = $.Event(type, props)
+    context.trigger(event, args)
+    return !event.isDefaultPrevented()
+  }
+
+  var timeoutTimer
+
+  options.beforeSend = function(xhr, settings) {
+    // No timeout for non-GET requests
+    // Its not safe to request the resource again with a fallback method.
+    if (settings.type !== 'GET') {
+      settings.timeout = 0
+    }
+
+    xhr.setRequestHeader('X-PJAX', 'true')
+    xhr.setRequestHeader('X-PJAX-Container', options.container)
+
+    if (!fire('pjax:beforeSend', [xhr, settings]))
+      return false
+
+    if (settings.timeout > 0) {
+      timeoutTimer = setTimeout(function() {
+        if (fire('pjax:timeout', [xhr, options]))
+          xhr.abort('timeout')
+      }, settings.timeout)
+
+      // Clear timeout setting so jquerys internal timeout isn't invoked
+      settings.timeout = 0
+    }
+
+    var url = parseURL(settings.url)
+    if (hash) url.hash = hash
+    options.requestUrl = stripInternalParams(url)
+  }
+
+  options.complete = function(xhr, textStatus) {
+    if (timeoutTimer)
+      clearTimeout(timeoutTimer)
+
+    fire('pjax:complete', [xhr, textStatus, options])
+
+    fire('pjax:end', [xhr, options])
+  }
+
+  options.error = function(xhr, textStatus, errorThrown) {
+    var container = extractContainer("", xhr, options)
+
+    var allowed = fire('pjax:error', [xhr, textStatus, errorThrown, options])
+    if (options.type == 'GET' && textStatus !== 'abort' && allowed) {
+      locationReplace(container.url)
+    }
+  }
+
+  options.success = function(data, status, xhr) {
+    var previousState = pjax.state
+
+    // If $.pjax.defaults.version is a function, invoke it first.
+    // Otherwise it can be a static string.
+    var currentVersion = typeof $.pjax.defaults.version === 'function' ?
+      $.pjax.defaults.version() :
+      $.pjax.defaults.version
+
+    var latestVersion = xhr.getResponseHeader('X-PJAX-Version')
+
+    var container = extractContainer(data, xhr, options)
+
+    var url = parseURL(container.url)
+    if (hash) {
+      url.hash = hash
+      container.url = url.href
+    }
+
+    // If there is a layout version mismatch, hard load the new url
+    if (currentVersion && latestVersion && currentVersion !== latestVersion) {
+      locationReplace(container.url)
+      return
+    }
+
+    // If the new response is missing a body, hard load the page
+    if (!container.contents) {
+      locationReplace(container.url)
+      return
+    }
+
+    pjax.state = {
+      id: options.id || uniqueId(),
+      url: container.url,
+      title: container.title,
+      container: options.container,
+      fragment: options.fragment,
+      timeout: options.timeout
+    }
+
+    if (options.push || options.replace) {
+      window.history.replaceState(pjax.state, container.title, container.url)
+    }
+
+    // Only blur the focus if the focused element is within the container.
+    var blurFocus = $.contains(context, document.activeElement)
+
+    // Clear out any focused controls before inserting new page contents.
+    if (blurFocus) {
+      try {
+        document.activeElement.blur()
+      } catch (e) { /* ignore */ }
+    }
+
+    if (container.title) document.title = container.title
+
+    fire('pjax:beforeReplace', [container.contents, options], {
+      state: pjax.state,
+      previousState: previousState
+    })
+    context.html(container.contents)
+
+    // FF bug: Won't autofocus fields that are inserted via JS.
+    // This behavior is incorrect. So if theres no current focus, autofocus
+    // the last field.
+    //
+    // http://www.w3.org/html/wg/drafts/html/master/forms.html
+    var autofocusEl = context.find('input[autofocus], textarea[autofocus]').last()[0]
+    if (autofocusEl && document.activeElement !== autofocusEl) {
+      autofocusEl.focus()
+    }
+
+    executeScriptTags(container.scripts)
+
+    var scrollTo = options.scrollTo
+
+    // Ensure browser scrolls to the element referenced by the URL anchor
+    if (hash) {
+      var name = decodeURIComponent(hash.slice(1))
+      var target = document.getElementById(name) || document.getElementsByName(name)[0]
+      if (target) scrollTo = $(target).offset().top
+    }
+
+    if (typeof scrollTo == 'number') $(window).scrollTop(scrollTo)
+
+    fire('pjax:success', [data, status, xhr, options])
+  }
+
+
+  // Initialize pjax.state for the initial page load. Assume we're
+  // using the container and options of the link we're loading for the
+  // back button to the initial page. This ensures good back button
+  // behavior.
+  if (!pjax.state) {
+    pjax.state = {
+      id: uniqueId(),
+      url: window.location.href,
+      title: document.title,
+      container: options.container,
+      fragment: options.fragment,
+      timeout: options.timeout
+    }
+    window.history.replaceState(pjax.state, document.title)
+  }
+
+  // Cancel the current request if we're already pjaxing
+  abortXHR(pjax.xhr)
+
+  pjax.options = options
+  var xhr = pjax.xhr = $.ajax(options)
+
+  if (xhr.readyState > 0) {
+    if (options.push && !options.replace) {
+      // Cache current container element before replacing it
+      cachePush(pjax.state.id, [options.container, cloneContents(context)])
+
+      window.history.pushState(null, "", options.requestUrl)
+    }
+
+    fire('pjax:start', [xhr, options])
+    fire('pjax:send', [xhr, options])
+  }
+
+  return pjax.xhr
+}
+
+// Public: Reload current page with pjax.
+//
+// Returns whatever $.pjax returns.
+function pjaxReload(container, options) {
+  var defaults = {
+    url: window.location.href,
+    push: false,
+    replace: true,
+    scrollTo: false
+  }
+
+  return pjax($.extend(defaults, optionsFor(container, options)))
+}
+
+// Internal: Hard replace current state with url.
+//
+// Work for around WebKit
+//   https://bugs.webkit.org/show_bug.cgi?id=93506
+//
+// Returns nothing.
+function locationReplace(url) {
+  window.history.replaceState(null, "", pjax.state.url)
+  window.location.replace(url)
+}
+
+
+var initialPop = true
+var initialURL = window.location.href
+var initialState = window.history.state
+
+// Initialize $.pjax.state if possible
+// Happens when reloading a page and coming forward from a different
+// session history.
+if (initialState && initialState.container) {
+  pjax.state = initialState
+}
+
+// Non-webkit browsers don't fire an initial popstate event
+if ('state' in window.history) {
+  initialPop = false
+}
+
+// popstate handler takes care of the back and forward buttons
+//
+// You probably shouldn't use pjax on pages with other pushState
+// stuff yet.
+function onPjaxPopstate(event) {
+
+  // Hitting back or forward should override any pending PJAX request.
+  if (!initialPop) {
+    abortXHR(pjax.xhr)
+  }
+
+  var previousState = pjax.state
+  var state = event.state
+  var direction
+
+  if (state && state.container) {
+    // When coming forward from a separate history session, will get an
+    // initial pop with a state we are already at. Skip reloading the current
+    // page.
+    if (initialPop && initialURL == state.url) return
+
+    if (previousState) {
+      // If popping back to the same state, just skip.
+      // Could be clicking back from hashchange rather than a pushState.
+      if (previousState.id === state.id) return
+
+      // Since state IDs always increase, we can deduce the navigation direction
+      direction = previousState.id < state.id ? 'forward' : 'back'
+    }
+
+    var cache = cacheMapping[state.id] || []
+    var containerSelector = cache[0] || state.container
+    var container = $(containerSelector), contents = cache[1]
+
+    if (container.length) {
+      if (previousState) {
+        // Cache current container before replacement and inform the
+        // cache which direction the history shifted.
+        cachePop(direction, previousState.id, [containerSelector, cloneContents(container)])
+      }
+
+      var popstateEvent = $.Event('pjax:popstate', {
+        state: state,
+        direction: direction
+      })
+      container.trigger(popstateEvent)
+
+      var options = {
+        id: state.id,
+        url: state.url,
+        container: containerSelector,
+        push: false,
+        fragment: state.fragment,
+        timeout: state.timeout,
+        scrollTo: false
+      }
+
+      if (contents) {
+        container.trigger('pjax:start', [null, options])
+
+        pjax.state = state
+        if (state.title) document.title = state.title
+        var beforeReplaceEvent = $.Event('pjax:beforeReplace', {
+          state: state,
+          previousState: previousState
+        })
+        container.trigger(beforeReplaceEvent, [contents, options])
+        container.html(contents)
+
+        container.trigger('pjax:end', [null, options])
+      } else {
+        pjax(options)
+      }
+
+      // Force reflow/relayout before the browser tries to restore the
+      // scroll position.
+      container[0].offsetHeight // eslint-disable-line no-unused-expressions
+    } else {
+      locationReplace(location.href)
+    }
+  }
+  initialPop = false
+}
+
+// Fallback version of main pjax function for browsers that don't
+// support pushState.
+//
+// Returns nothing since it retriggers a hard form submission.
+function fallbackPjax(options) {
+  var url = $.isFunction(options.url) ? options.url() : options.url,
+      method = options.type ? options.type.toUpperCase() : 'GET'
+
+  var form = $('<form>', {
+    method: method === 'GET' ? 'GET' : 'POST',
+    action: url,
+    style: 'display:none'
+  })
+
+  if (method !== 'GET' && method !== 'POST') {
+    form.append($('<input>', {
+      type: 'hidden',
+      name: '_method',
+      value: method.toLowerCase()
+    }))
+  }
+
+  var data = options.data
+  if (typeof data === 'string') {
+    $.each(data.split('&'), function(index, value) {
+      var pair = value.split('=')
+      form.append($('<input>', {type: 'hidden', name: pair[0], value: pair[1]}))
+    })
+  } else if ($.isArray(data)) {
+    $.each(data, function(index, value) {
+      form.append($('<input>', {type: 'hidden', name: value.name, value: value.value}))
+    })
+  } else if (typeof data === 'object') {
+    var key
+    for (key in data)
+      form.append($('<input>', {type: 'hidden', name: key, value: data[key]}))
+  }
+
+  $(document.body).append(form)
+  form.submit()
+}
+
+// Internal: Abort an XmlHttpRequest if it hasn't been completed,
+// also removing its event handlers.
+function abortXHR(xhr) {
+  if ( xhr && xhr.readyState < 4) {
+    xhr.onreadystatechange = $.noop
+    xhr.abort()
+  }
+}
+
+// Internal: Generate unique id for state object.
+//
+// Use a timestamp instead of a counter since ids should still be
+// unique across page loads.
+//
+// Returns Number.
+function uniqueId() {
+  return (new Date).getTime()
+}
+
+function cloneContents(container) {
+  var cloned = container.clone()
+  // Unmark script tags as already being eval'd so they can get executed again
+  // when restored from cache. HAXX: Uses jQuery internal method.
+  cloned.find('script').each(function(){
+    if (!this.src) $._data(this, 'globalEval', false)
+  })
+  return cloned.contents()
+}
+
+// Internal: Strip internal query params from parsed URL.
+//
+// Returns sanitized url.href String.
+function stripInternalParams(url) {
+  url.search = url.search.replace(/([?&])(_pjax|_)=[^&]*/g, '').replace(/^&/, '')
+  return url.href.replace(/\?($|#)/, '$1')
+}
+
+// Internal: Parse URL components and returns a Locationish object.
+//
+// url - String URL
+//
+// Returns HTMLAnchorElement that acts like Location.
+function parseURL(url) {
+  var a = document.createElement('a')
+  a.href = url
+  return a
+}
+
+// Internal: Return the `href` component of given URL object with the hash
+// portion removed.
+//
+// location - Location or HTMLAnchorElement
+//
+// Returns String
+function stripHash(location) {
+  return location.href.replace(/#.*/, '')
+}
+
+// Internal: Build options Object for arguments.
+//
+// For convenience the first parameter can be either the container or
+// the options object.
+//
+// Examples
+//
+//   optionsFor('#container')
+//   // => {container: '#container'}
+//
+//   optionsFor('#container', {push: true})
+//   // => {container: '#container', push: true}
+//
+//   optionsFor({container: '#container', push: true})
+//   // => {container: '#container', push: true}
+//
+// Returns options Object.
+function optionsFor(container, options) {
+  if (container && options) {
+    options = $.extend({}, options)
+    options.container = container
+    return options
+  } else if ($.isPlainObject(container)) {
+    return container
+  } else {
+    return {container: container}
+  }
+}
+
+// Internal: Filter and find all elements matching the selector.
+//
+// Where $.fn.find only matches descendants, findAll will test all the
+// top level elements in the jQuery object as well.
+//
+// elems    - jQuery object of Elements
+// selector - String selector to match
+//
+// Returns a jQuery object.
+function findAll(elems, selector) {
+  return elems.filter(selector).add(elems.find(selector))
+}
+
+function parseHTML(html) {
+  return $.parseHTML(html, document, true)
+}
+
+// Internal: Extracts container and metadata from response.
+//
+// 1. Extracts X-PJAX-URL header if set
+// 2. Extracts inline <title> tags
+// 3. Builds response Element and extracts fragment if set
+//
+// data    - String response data
+// xhr     - XHR response
+// options - pjax options Object
+//
+// Returns an Object with url, title, and contents keys.
+function extractContainer(data, xhr, options) {
+  var obj = {}, fullDocument = /<html/i.test(data)
+
+  // Prefer X-PJAX-URL header if it was set, otherwise fallback to
+  // using the original requested url.
+  var serverUrl = xhr.getResponseHeader('X-PJAX-URL')
+  obj.url = serverUrl ? stripInternalParams(parseURL(serverUrl)) : options.requestUrl
+
+  var $head, $body
+  // Attempt to parse response html into elements
+  if (fullDocument) {
+    $body = $(parseHTML(data.match(/<body[^>]*>([\s\S.]*)<\/body>/i)[0]))
+    var head = data.match(/<head[^>]*>([\s\S.]*)<\/head>/i)
+    $head = head != null ? $(parseHTML(head[0])) : $body
+  } else {
+    $head = $body = $(parseHTML(data))
+  }
+
+  // If response data is empty, return fast
+  if ($body.length === 0)
+    return obj
+
+  // If there's a <title> tag in the header, use it as
+  // the page's title.
+  obj.title = findAll($head, 'title').last().text()
+
+  if (options.fragment) {
+    var $fragment = $body
+    // If they specified a fragment, look for it in the response
+    // and pull it out.
+    if (options.fragment !== 'body') {
+      $fragment = findAll($fragment, options.fragment).first()
+    }
+
+    if ($fragment.length) {
+      obj.contents = options.fragment === 'body' ? $fragment : $fragment.contents()
+
+      // If there's no title, look for data-title and title attributes
+      // on the fragment
+      if (!obj.title)
+        obj.title = $fragment.attr('title') || $fragment.data('title')
+    }
+
+  } else if (!fullDocument) {
+    obj.contents = $body
+  }
+
+  // Clean up any <title> tags
+  if (obj.contents) {
+    // Remove any parent title elements
+    obj.contents = obj.contents.not(function() { return $(this).is('title') })
+
+    // Then scrub any titles from their descendants
+    obj.contents.find('title').remove()
+
+    // Gather all script[src] elements
+    obj.scripts = findAll(obj.contents, 'script[src]').remove()
+    obj.contents = obj.contents.not(obj.scripts)
+  }
+
+  // Trim any whitespace off the title
+  if (obj.title) obj.title = $.trim(obj.title)
+
+  return obj
+}
+
+// Load an execute scripts using standard script request.
+//
+// Avoids jQuery's traditional $.getScript which does a XHR request and
+// globalEval.
+//
+// scripts - jQuery object of script Elements
+//
+// Returns nothing.
+function executeScriptTags(scripts) {
+  if (!scripts) return
+
+  var existingScripts = $('script[src]')
+
+  scripts.each(function() {
+    var src = this.src
+    var matchedScripts = existingScripts.filter(function() {
+      return this.src === src
+    })
+    if (matchedScripts.length) return
+
+    var script = document.createElement('script')
+    var type = $(this).attr('type')
+    if (type) script.type = type
+    script.src = $(this).attr('src')
+    document.head.appendChild(script)
+  })
+}
+
+// Internal: History DOM caching class.
+var cacheMapping      = {}
+var cacheForwardStack = []
+var cacheBackStack    = []
+
+// Push previous state id and container contents into the history
+// cache. Should be called in conjunction with `pushState` to save the
+// previous container contents.
+//
+// id    - State ID Number
+// value - DOM Element to cache
+//
+// Returns nothing.
+function cachePush(id, value) {
+  cacheMapping[id] = value
+  cacheBackStack.push(id)
+
+  // Remove all entries in forward history stack after pushing a new page.
+  trimCacheStack(cacheForwardStack, 0)
+
+  // Trim back history stack to max cache length.
+  trimCacheStack(cacheBackStack, pjax.defaults.maxCacheLength)
+}
+
+// Shifts cache from directional history cache. Should be
+// called on `popstate` with the previous state id and container
+// contents.
+//
+// direction - "forward" or "back" String
+// id        - State ID Number
+// value     - DOM Element to cache
+//
+// Returns nothing.
+function cachePop(direction, id, value) {
+  var pushStack, popStack
+  cacheMapping[id] = value
+
+  if (direction === 'forward') {
+    pushStack = cacheBackStack
+    popStack  = cacheForwardStack
+  } else {
+    pushStack = cacheForwardStack
+    popStack  = cacheBackStack
+  }
+
+  pushStack.push(id)
+  id = popStack.pop()
+  if (id) delete cacheMapping[id]
+
+  // Trim whichever stack we just pushed to to max cache length.
+  trimCacheStack(pushStack, pjax.defaults.maxCacheLength)
+}
+
+// Trim a cache stack (either cacheBackStack or cacheForwardStack) to be no
+// longer than the specified length, deleting cached DOM elements as necessary.
+//
+// stack  - Array of state IDs
+// length - Maximum length to trim to
+//
+// Returns nothing.
+function trimCacheStack(stack, length) {
+  while (stack.length > length)
+    delete cacheMapping[stack.shift()]
+}
+
+// Public: Find version identifier for the initial page load.
+//
+// Returns String version or undefined.
+function findVersion() {
+  return $('meta').filter(function() {
+    var name = $(this).attr('http-equiv')
+    return name && name.toUpperCase() === 'X-PJAX-VERSION'
+  }).attr('content')
+}
+
+// Install pjax functions on $.pjax to enable pushState behavior.
+//
+// Does nothing if already enabled.
+//
+// Examples
+//
+//     $.pjax.enable()
+//
+// Returns nothing.
+function enable() {
+  $.fn.pjax = fnPjax
+  $.pjax = pjax
+  $.pjax.enable = $.noop
+  $.pjax.disable = disable
+  $.pjax.click = handleClick
+  $.pjax.submit = handleSubmit
+  $.pjax.reload = pjaxReload
+  $.pjax.defaults = {
+    timeout: 650,
+    push: true,
+    replace: false,
+    type: 'GET',
+    dataType: 'html',
+    scrollTo: 0,
+    maxCacheLength: 20,
+    version: findVersion
+  }
+  $(window).on('popstate.pjax', onPjaxPopstate)
+}
+
+// Disable pushState behavior.
+//
+// This is the case when a browser doesn't support pushState. It is
+// sometimes useful to disable pushState for debugging on a modern
+// browser.
+//
+// Examples
+//
+//     $.pjax.disable()
+//
+// Returns nothing.
+function disable() {
+  $.fn.pjax = function() { return this }
+  $.pjax = fallbackPjax
+  $.pjax.enable = enable
+  $.pjax.disable = $.noop
+  $.pjax.click = $.noop
+  $.pjax.submit = $.noop
+  $.pjax.reload = function() { window.location.reload() }
+
+  $(window).off('popstate.pjax', onPjaxPopstate)
+}
+
+
+// Add the state property to jQuery's event object so we can use it in
+// $(window).bind('popstate')
+if ($.event.props && $.inArray('state', $.event.props) < 0) {
+  $.event.props.push('state')
+} else if (!('state' in $.Event.prototype)) {
+  $.event.addProp('state')
+}
+
+// Is pjax supported by this browser?
+$.support.pjax =
+  window.history && window.history.pushState && window.history.replaceState &&
+  // pushState isn't reliable on iOS until 5.
+  !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
+
+if ($.support.pjax) {
+  enable()
+} else {
+  disable()
+}
+
+})(jQuery)