JF v3.2 i2c support

[trentgill]

Adds crow support for new i2c features in Just Friends v3.2 (forthcoming).

One new setter:

• voice_pitch(channel,pitch) is like play_voice but doesn't trigger the envelope for legato playing.

Getters:

• run_mode: returns the just-type run status (not the hardware jack). 0=off, 1=on
• mode: returns the synthesis/geode mode setting: 0=normal mode, 1=synthesis/geode
• speed: returns the setting of the speed switch: 0=shape, 1=sound
• tsc: returns the setting of the MODE switch: 0=transient, 1=sustain, 2=cycle

Questions:

• should boolean states be 0/1 (not 1/2?)
• should the 'tsc' switch be 1/2/3 (probably it's lua, and it's not a boolean?)
• naming of 'mode' (changing to synthesis/geode mode) is a weird clash with the JF front panel 'MODE' for the 'tsc' switch. Would like to change but would break existing scripts (probably not worth it).

[tehn]

excited for this!

[trentgill]

This is ready for final testing. Requires new JF & Crow firmwares. JF3.2 to be co-released with Crow 2.0