- major code refactoring
- changed minimum SDK version from 7 to 10
- changed versionCode to 5
- changed versionName to 0.12
- added Sexually Transmitted Infections (STI) information feature 
- added Contraception information feature 
- added expandableListFragment class for use with tab fragments
- added navigation bar with "Back", "Home" buttons and SubMenu to all
activities 
- converted all views to sherlockActionBar
- replaced buttons from most activities with an easier-navigable submenu
at parentBottom of each activity
- added drawables and images to STI and contraception activities
- added drawable icons for all submenus
- removed all instances of original CustomWindow layout
- cleaned up myth/fact activity to include current/total question,
correct/incorrect answer feedback
- fixed major heap overflow bug involving overly large drawables
- removed intermediary "need help or learn more page". consolidated
these functions into HomeActivity
- removed intermediary "info or take a quiz" page for STI info. Moved
this "take a quiz" button to each STI tab instead
- implemented paged tabs support for STI info feature
- implemented tabbed fragments support for contraception feature