1.0.2 - Update examples

This requires CircuitPython 0.9.4+!

Update the examples to busio which uses bitbanging on the ESP8266.

Swap to UnaryStruct internally.

Switched to UnaryStruct for simplified register access. Note this requires the latest version of Adafruit_Register!

Initial release for Travis MPY build

1.0.0

Create .travis.yml