Removed unnecessary files from repository
Update CONTRIBUTING.md
Update CONTRIBUTING.md (fixed bad link)
Merge pull request #74 from dinder-mufflin/jonn

Update CONTRIBUTING.md
Delete Transport.java

This file was never used.
Added documentation for MidiPlayer class.
Removed GUI Frame class (unused). Merged comments into Frame class.
Documentation for the Frame class added.
Added documentation for Tabature object.
Removed StringFret class (unused).
Merge pull request #76 from dinder-mufflin/jonn-documentation

Cleanup and Documentation
Merge remote-tracking branch 'origin/master' into justin