Every component is designed to work independently, and most of them are just like Sprite,all the common operations(property manipulation, lifecycle control,display list control,event system) should works fine without additional works.But the whole system also offers funtionality to make life easier when building UI interfaces.
Details for this project(By which I mean docs and Wikis) will be added when most of the components(most of the frequently used) works perfectly (or nearly),so for now,just check it out and try.