Upgrade to IOIO firmware 5.00

Performance upgrades. Now reasonably smooth fader response.
Minor touch-ups post first demo

A first order IIR filters every analog input.
Takeover only activated when passing parameter on the way Down.
Hardware buttons output velocity of 1 and always transmit on MIDIch1.
Only software buttons have a dynamic velocity.
Minor touch-ups 2

Changed MIDI channel to 16 and started implementing the params class
with pads.
Untested MIDI In functionality.
Velocity sensitivity added!

Also cleaned up some parameter stuff to prepare for MIDI in
implementation.
X/Y-control added

Clean up of the XYEvents-class is needed.
Make proper get- and mutate methods
Cleaned up and made a new SlideEventHandler

Resolution of x-slide events still needs to be fine tuned
Added MIDI in functionality

BPM calculation is working. Added classes for future support of analog
sync.
MIDI in needs further development and is not bug free, Scene Launch
functionality isn't perfect.
Gate output functionality added to MIDIBeatClock

Pin 47 outputs 16 note gate messages
Merge branch 'midi_implementation'