* Updated some internal I2C xfer stuff to better match latest datasheet recommendations.
* Added/updated examples to show slowed down I2C clock frequency.
To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://circuitpython.org/libraries).
To use in CPython, `pip3 install adafruit-circuitpython-scd30`.
Read the [docs](http://circuitpython.readthedocs.io/projects/scd30/en/latest/) for info on how to use it.