Revove wrongly added tabs from version control.
Merge branch 'remove_tabs'
Chord bass attribute
Split regexp in capturing and non capturing in notes module
Simplified Chord.parse method
Basic chord parsing tests
Test chord w/bass parsing
memoized functions return copies of objects
ChordFinder support bass
@memoize cache immutability test
Merge branch 'issue-16-bassed-chords'

Closes #16