Add ScrollableContainer widget
Add ViewStack, SidePane and LinearLayout
Improve Scrollable.js
Add unit tests
Take into account Bill's comments.
Removed scroll-related code (moved to @AdrianVasiliu fork).
LinearLayout: Replace the tag selector by the class selector.
Add bidi support to SidePane
Improve robustness of ViewStack on aggressive interactions (starting transitions during other transitions)
 Fix showPrevious/showNext
 Apply https://github.com/dmandrioli/deliteful/commit/b81d84f37a73c23a7b82e8962f2a068656fb7a0a#viewstack-js-P32

Remove Contained dependency

Syncing with https://github.com/ibm-dojo/delite/pull/89

Syncing with delite: transitionDeferred => delite-display-complete event