Implements boot animation indicator and fix recovery in iii mode

This release updates the boot animation for both monome and iii modes similar to Monome's Grid.

The “mode” is indicated by the startup light pattern.

The “mode” is indicated by the startup light pattern.

particles: this is standard monome/serial mode, compatible with norns, serialosc, ansible, etc.

waves: iii mode

(Particles looks like an explosion, waves more like ripples).

To change the mode, while powering up / plugging in the device hold down the top-left (1,1) button.

To recover from a crashing startup script in iii mode, boot to iii mode and keep holding the top-left button until the top-row fills up. Grid will load without calling init.lua in a clean state.

Full Changelog: v0.3.14...v0.3.16