If there are exceptions in the boot sequence, it throws them instead of just printing them in the console log. This is to make extension developers aware of the error in development time as opposed to runtime
Makes task connect always a prerequisite for task spec
Goes back to initial Aura error handling for extensions and adds
an extra test to document it.
Typo
Fixes more typos
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
Merge branch 'master' of git://github.com/aurajs/aura
Merge branch 'master' of github.com:Lulo/aura
#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
exposes EE2 .once interface, closes #261
Merge pull request #277 from Buritica/261-sandbox-once

exposes EE2 .once interface, closes #261
Introducing AOP for widgets