Some package restructuring
Remove a ton of stuff
Clean up subject layout
Remove unused models
Massive xml rework
Change name of sound utility
Clean up xml
Use color utility
Merge branch 'master' into feature/duplicate-code-cleanup

Conflicts:
	src/com/flashmath/activity/QuestionActivity.java
Merge branch 'master' into feature/offline_mode

Conflicts:
	src/com/education/flashmath/SubjectActivity.java
	src/com/flashmath/activity/LongActivity.java
	src/com/flashmath/activity/ResultActivity.java
Move new classes into new package structure