Fixes the initialization to `PixelBuf.__init__()` for boards using the `adafruit_pixelbuf` library by providing the `size`/`n` argument as positional. Thanks Neradoc!
To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-seesaw`.
Read the [docs](http://circuitpython.readthedocs.io/projects/seesaw/en/latest/) for info on how to use it.