Add GTop I2C support and unify examples a bit
Adds 'raw' I2C interface for communicating with GPS devices that have it. Also, did a bit of a cleanup of examples to unify them datalogging examples.
To use in CircuitPython, simply install the Adafruit CircuitPython bundle.
To use in CPython, pip3 install adafruit-circuitpython-gps
.
Read the docs for info on how to use it.