We can't go to 3.0.1 yet as there are still build issues on
Linux and OSX. You can get Windows to build, but there's
still some display issues.
These changes should work with wxWidgets 2.8.12 as well, so
we can take our time to get things working properly before
switching over.
* from and to octave spin controls and cross-updating
* new conversion utilities in PitchName.*
* code simplification, new documentation
* stop a few compiler warnings in FreqWindow.cpp on unused params