Merge pull request #91 from teotigraphix/master

Fixed Issue#90 flashing 2nd row lights
Added code in SessionView to account for arrangement bug with 2nd row record
buttons not being refresed when switched back to clip layout
Organized CursorDeviceProxy members
Organized GrooveProxy, added its public Bitwig API.
Organized TransportProxy members, added missing Bitwig Transport API