v0.2.0

For all intents and purposes the first release.

• Control lights over OPC, potentially using the homebridge-opc plugin
• Animate transitions between colors (including on/off)
  • Not designed for use with quick updates from the corresponding OPC client

Not really designed to be portable across setups. Assumes, among probably other things:

• LEDs are connected to the RPi's SPI pins (MOSI and SCLK)
• LEDs are safe to drive at 100%
• There are exactly 93 LEDs in the strip
• You want to listen for OPC commands on port 2323