Debug extension logging
Merge pull request #240 from dotCypress/DebugExtension

Debug extension logging
Fixes aurajs/aura#204

Changes related to aurajs/aura#245
Merge pull request #248 from dotCypress/issues/204

Fixes aurajs/aura#204
Update README.md

The widgets extension looks for the key 'widgets', not for the key widget:

```js
 afterAppStart: function(app) {
        // Auto start widgets when the app is loaded.
        if (app.startOptions.widgets) { // <== RIGHT HERE!
          app.core.start(app.startOptions.widgets);
        }
      }
```

So i'm updating the readme to describe it properly.
Merge pull request #251 from Pickachu/patch-1

Fix wrong key on README.md example: 'widget' for 'widgets'
Widget config fix
Merge pull request #254 from dotCypress/fix/widgets-config

Widget config fix
Defines the config for Underscore and Backbone conditionnally
removes extra comma
docs(extension): add details about extensions directory

Reverse engineered from Boilerplate: 
https://github.com/aurajs/boilerplate/tree/master/app
Merge pull request #259 from xcambar/feature/external_underscore_backbone

Defines the RequireJS config for Underscore and Backbone conditionnally
#263 Fix IE8 and IE9 logging
Merge pull request #264 from steffenmllr/master

Fix IE8 + IE9 Logging
Make Function.prototype.bind faster and work with ie8
Merge pull request #265 from steffenmllr/master

Make Function.prototype.bind play nice with ie8
Merge pull request #260 from edouard-lopez/patch-1

docs(extension): add details about extensions directory
Ignore .sass-cache