- fixed indentation (2 spaces)

- added missing new lines at the end of files
- removed 'ps-theme-big-and-ugly' theme
- improved readme.md. Added an example on how to create custom themes with scss.

README.md

@@ -309,7 +309,7 @@ The number of pixels the content height can surpass the container height without
 **Default: 0**
 
 ### stopPropagationOnClick
-When set to false, when clicking on a rail, the click event will be allowed to propagate.  
+When set to false, when clicking on a rail, the click event will be allowed to pr##opagate.  
 **Default: true**
 
 ### useSelectionScroll
@@ -317,29 +317,35 @@ When set to true, you can scroll the container by selecting text and move the cu
 **Default: false**
 
 ### theme
-A string. It's a class name added to the container element. The class name is prepended with `ps-theme-`. So default theme class name is `ps-theme-default`. In order to create custom themes with scss use `ps-container($theme)` mixin, where `$theme` is a scss map. Look at `themes.scss` as a reference for how to create custom themes.  
+A string. It's a class name added to the container element. The class name is prepended with `ps-theme-`. So default theme class name is `ps-theme-default`. In order to create custom themes with scss use `ps-container($theme)` mixin, where `$theme` is a scss map.  
 **Default: 'default'**
 
-Example:
+**Example 1:**
 
+Add `theme` parameter:
 ```javascript
 Ps.initialize(container, {
-  theme: 'my-theme-name',
+  theme: 'my-theme-name'
 });
 ```
-
-```css
+Create a class name prefixed with `.ps-theme-`. Include `ps-container()` mixin. It's recommended to use `map-merge()` to extend `$ps-theme-default` map with your custom styles.
+```css#
 .ps-theme-my-theme-name {
   @include ps-container(map-merge($ps-theme-default, (
-          border-radius: 0,
-          scrollbar-x-rail-height: 20px,
-          scrollbar-x-height: 20px,
-          scrollbar-y-rail-width: 20px,
-          scrollbar-y-width: 20px,)
+    border-radius: 0,
+    scrollbar-x-rail-height: 20px,
+    scrollbar-x-height: 20px,
+    scrollbar-y-rail-width: 20px,
+    scrollbar-y-width: 20px,)
   ));
 }
 ```
 
+**Example 2:**
+
+Alternatively, if you don't want to create your own themes, but only modify the default one, you could simply overwrite `$ps-*` variables with your own values. In this case `theme` parameter is not required when calling `.initialize()` method. Remember do define your own variables before the `theme.scss` file is imported.
+
+
 ## Events
 
 perfect-scrollbar dispatches custom events.