Added Middle Graphics Layer and Adafruit IO Functionality
This release includes the following changes
- Graphics layer is separated out from matrixportal class, so now bitmaps display is easier without having to load the whole thing
- AdafruitIO Functionality improved with accessor classes added to matrixportal class for convenience.
To use in CircuitPython, simply install the Adafruit CircuitPython bundle.
Read the docs for info on how to use it.