This release:
* https://github.com/adafruit/Adafruit_CircuitPython_AdafruitIO/pull/46 Adds `add_feed_callback` and `remove_feed_callback` to set up feed-specific message handlers methods.
* [View the usage example here](https://github.com/adafruit/Adafruit_CircuitPython_AdafruitIO/blob/master/examples/adafruit_io_mqtt/adafruit_io_feed_callback.py)
To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-adafruitio`.
Read the [docs](http://circuitpython.readthedocs.io/projects/adafruitio/en/latest/) for info on how to use it.