Dependencies
v1.7.1
Merge branch 'master' of github.com:ejlilley/music-pitch
Restore Common.Pitch to work with new intervals

TODO move both to internal modules to hide internal concepts
shared between Pitch and Interval
Fix error in Common.Interval (octaves/simple/separate)
clean-up of music-pitch rewrite
Fix misc errors with Common.Interval

- Fixes number for negative intervals
- Fixes mkInterval' and intervalDiff to work with large intervals
- Misc cleaning
Fix error in Common.Interval

- Octaves giving erronous result for negative octave multiples
Doc fixes
Fix implementation of Common.invert
Docs
Add IsPitch instance for Hertz (see TODO note)
Cleaning
Fix credit/copyright
Generic equal temperament pitches #28

Sketchy imlpementation
Temporary undo type-level dependency

(Does not compile on HP 2014.2.0.0)
Merge remote-tracking branch 'remotes/official/master'

Conflicts:
	src/Music/Pitch/Common/Interval.hs
Merge remote-tracking branch 'remotes/official/master'

Conflicts:
	src/Music/Pitch/Common/Interval.hs
Initial work on tuning systems -- syntonic and TET12, both absolute tuning for pitches and relative (ratios) for intervals