Removed sample rate from sheet. Added clef enum for staff class
Adding copy constructors to all classes to allow for deep copies of objects
Merge branch 'master' of http://github.com/CSE120PowerRangers/MusicNotes

Conflicts:
	bin/MusicNotes.apk
	bin/resources.ap_
Added copy constructors and method to add/fetch measures
Added size methods to music classes. Implemented staff and sheet classes