Changes to Limb and Blu3s
- Limb now is an interface and has currently a single implementation
(former Limb2)
- Limbs now use a calibrationStrategy for calibration
- Tw0 CalibrationStrategies added
- Blu3s split in two. 
- Blu3s implements all possible behaviours 
Blu3sMusician implements musician and translates midi events into
behaviour