loosened cabal file
split out all the transposer work from Main into Transposer module
moved underlying note types and theory from ChordParser into +Notes

Also moved theory from Player into Notes
player module renamed to voicer
tidy
minor tweak to Readme (ping)
another sample chord sheet - i'll fly away (short)
wrote test expectations for chord parser in two fashions. choosing.
implemented HUnit tests for chord parser
simplify transposeChordSheetItem and introduce transposeChord
correct chordToSym to include 7ths, 9ths, etc (what we currently have as
"decorations" (sic))