Reformatted

NEW CHANGES
- Refactored a lot for speed
- Added a lot of basic JavaDoc
- Added a lot of feedback through JTextField (e.g. save
cancelled/failed)
- Added a lot of logging, commented out and listed as TODO
(uncomment once implemented properly)

FIXES
- Removed redundant fields from MusicSheet
- Spacing
- Catch clauses
- Renamed some variables to fit Java convention

TO DO/BROKEN
- Log does not work ("java.io.IOException: Couldn't get lock for
logs/MyLogFile xxxxxxxxxxxxx.log")