Merge pull request #128 from teotigraphix/master

Fixed Issue #126 and #127
Fixed Issue #129 Long press Master for Frame does not revert to
correct previous mode
- still one minor nagging bug, when in Master mode and long press
(reverts the the previous mode before Master),
something needs to be changed slightly to fix this as there are more than
one Master change happening since the track is selected causing a mode
change.
Fixed Issue #131 - knob acceleration - faster acceleration when
turning to the right than to the left