Clean Slate: remove unnecessary/not yet necessary stuff.
started refactoring + early liquibase integration
fiddled around with liquibase + hsqldb stuff
threw some more old stuff away. moving onward... relative chords seem to work
rebuildrebuildrebuild

Todo: Must directly map ChordFormula to ChromaticScale.
Mapping to BaseScale is useless in this iteration,
'cause my RelativeChords can't handle notes which are off the scale (see 'b' and '#')
save-point - another in-bewteen commit. let me try something...
looking good. Chord-model seems legit. Coninueing with BasicNotes and AbsoluteNotes
some Note stuff