Make SMFSource suck significantly less.

Make SMFSource suck significantly less.
Read from MidiRingbuffer directly into model, don't read MidiRingBuffer into a new midi buffer, then into the model.
Pass rec data to UI via model instead of a separate buffer.
Read MIDI CC data into MidiModel (though not actually used yet).
Made quantization toggle edited flag so model is saved.

git-svn-id: svn://localhost/ardour2/trunk@2308 d708f5d6-7413-0410-9779-e7cbd77b26cf