Recorder adds blank notes for rests

Recorder adds a note with 0 pitch and 0 velocity when no note is being played. These are to be interpreted as rests.
Clean up debug output

Parser no longer outputs its status.
Print functions added to SheetMusic, Measure, and Note.
Fix unecessary rest at the end of a measure at the end of a song in Recorder
Fix bug #3
Progress on Guitar Tab Converter

Button for Guitar Tab conversion, tunings for guitar E-Bb, and getNote in GuitarTabConverter made.
Fix merge conflicts