Began implementation of UI for home activity
Began Drawer List Implementation

Implemented a base class for a ExpandibleListView adapter.
Added Styles to Navigation Drawer and ActionBar
Merge remote-tracking branch 'origin/devel' into wip/home
Completed Visual Interface for Navigation Drawer

State-aware eye-candy now in place for navigation drawer. Icons for each navigation item added, as well as an interface for adding such icons. Drawer will now only show a collapse/expand indicator for groups with non-zero children.
Added comments to HomeActivity
Merge branch 'devel' of github.com:hpxro7/UWSchedule into devel
Merge branch 'wip/navdrawer' into devel

navdrawer ui interface topic now ready for deployment in devel