Fraction and fraction test
Rests and tuplet tests
Add some methods to Fraction and Song classes
Header parses in Main for all samples
Change structure of chords, notes and tuplets
Merge branch 'implement_ADT' of github.com:Jdhaimson/abcmusicplayer into implement_ADT
Merge branch 'implement_ADT' of github.com:Jdhaimson/abcmusicplayer into FixingLexerParserBugs
updated MusicPlayerHeader, added parse method
Main fixed