Coding style cleanup.
Handling null-velocity NoteOn as NoteOff (with setting), inlined some methods.
Merge branch 'master' into dev
Added explicit license header and starting 4.1 branch.
Helper method.
Doc & coding style.
Added validation script using Arduino 1.5 CLI.
Always better in Python.
Better printout.
Fix build.
Merge branch 'dev' into release/4.1
Dictate.
Added validation from Sublime Text.
Updated examples to work on Leo, Uno, Mega & Due.
Fix: list directories only.
Added MIDI to validator (requires python-rtmidi).
Cleanup old validator
Bidirectionnal MIDI.
Added tester object with thru check.
Testing.