Change to eslint from jshint.

It's way better. Original files have been linted.

src/js/lib/guid.js

@@ -3,13 +3,13 @@
  */
 'use strict';
 
-module.exports = (function() {
+module.exports = (function () {
   function s4() {
     return Math.floor((1 + Math.random()) * 0x10000)
                .toString(16)
                .substring(1);
   }
-  return function() {
+  return function () {
     return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
            s4() + '-' + s4() + s4() + s4();
   };