Rudimentary parameter change from Nocturn speed dial
Use callback for controller UI update
Robustness: avoid calling NULL if notify_cb not set up
Added scaling of 2 for speed dial, and general incrementor accelleration
Add initial version of knobs interface (knobs.h)
Copied functions from gtk library for sorting widgets left/right and up/down
Rename knobs.[ch] -> knob_mapper.[ch]
Initial version of Blofeld knob mapping