Few different changes, most to Group and DataGroup:
1. GroupBase - added simple class ASDoc so it'll hopefully be included in the nightly ASDoc builds
2. Group - Removed support for ILists from Group.
3. ToggleButton - Moved around a method from skinLoaded to the constructor since it was just adding an event listener to the object and not the skin instance
4. DataGroup - Cleaned up a lot of the logic when a collectionChange event happens so that we don't just remove everything and add everything all the time. This also fixes a bug. Will work with QA to make sure this gets tested for all scenarios.