Upgrade Aura

* Use `app.components.addSource` method
* Replace `createSandbox` with `app.sandboxes.create`
* Replace `registerWidgetType` with `app.components.addType`
Rename widget to component
Merge remote-tracking branch 'origin/develop' into feature/upgrade-aura
Merge remote-tracking branch 'origin/develop' into feature/upgrade-aura
Updates bower.json
Adds bower_components to gitignore
Updates requirejs config files
Updates ref to $.cookie in api
Updates spec file
Updates demo index
Fixes easyXDM shim path
Merge pull request #87 from hull/feature/upgrade-aura

WIP: upgrade aura