Two inputs and one output for littleBits magnet modules to Eurorack

Adapter module to connect littleBits modules -- especially the synth kit modules, but not limited to them -- to Eurorack. The module provides 5v power and grounding, and connects the signals to jacks, and does voltage clamping to limit the inputs to 0-5v.

(Future versions will be built on PCB material and possibly include a second output jack, for things like the sequencer bit.)