Added the new `MulticolorComet` animation via `adafruit_led_animation.multicolor_comet`. Additionally adds some missing documentation of parameters. Thanks FoamyGuy!
To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-led-animation`.
Read the [docs](http://circuitpython.readthedocs.io/projects/led-animation/en/latest/) for info on how to use it.