- improve performance to set hasStableIds
- remove default itemAnimator because it causes some strange effects with setHasStableIds
- bring in new RecyclerViewCacheUtil to bring a solution to completely fix the lag when using many different drawerItem types inside a scrollable Drawer FIX #642
- improve safety of updateBadge, updateName, updateIcon methods
- improve ColorHolder
- use DimenHolder, ColorHolder, ImageHolder to improve AccountHeader
- add new api method to set the header background via the result object