Add OSC support so that Bubbles can be remote controlled

[colinbdclark]

A simple and fairly robust way to provide modulation of Bubbles' parameters from external processes (e.g. from Eurorack via VCV Rack) or controllers (e.g. TouchOSC or Arduino-based devices) is via Open Sound Control. We should add support a UDP-based OSC server to Bubbles (using osc.js, of course!).