Fixed the documentation for Sphinx 5.0.0 so that other libraries using it won't get errors when building their own documentation.
To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-ble`.
Read the [docs](http://circuitpython.readthedocs.io/projects/ble/en/latest/) for info on how to use it.