Move samples image resources from tests/images to sample/images.
Fix star rating sample css and star rating documentation.
Revert commit
https://github.com/ibm-js/deliteful/commit/a9a93476f726bc7c11a3900a94e265e593a2348a
: the change was not compatible with the grid role of the List widget.
Add ProgressIndicator widget
Add ProgressIndicator unit tests.
Add ProgressIndicator samples.
Fix https://github.com/ibm-js/deliteful/issues/47: List now leverage the
last delite/Store implementation, that uses dstore instead of
dojo/store.
Fix a few English typos