fix doc.
template: escape quotes in generated code
handles attribute values and innerText
add new mixins: transition shorthand, animation-delay, animation-direction + add missing property -moz-box-sizing in box-sizing mixin.
template: escape backslashes in text strings too
Fix tests: ensure assertions are checked after widget's refreshRendering(), thus fixing errors on IE10; remove useless inherintance from delite/Widget in test container, now that Scrollable extends Widget.
Refactor the delite/Scrollable test to allow reuse of the test cases by the test of deliteful/ScrollableContainer
fix a problem in renderItemToItem & add corresponding test  case