Add aui-widget module to provide class extensions in replacement of Component features
Add "WidgetCssClass" class extension to components created using "Base.create"
Update demos
Yogi alloy regenerate
Merge branch '2.0.x' into 2.0.x-deprecated

Conflicts:
	src/aui-base/js/aui-aliases.js
	src/aui-base/js/aui-loader.js