Doc updates

Update the docs to correct examples.

To use in CircuitPython, download the .mpy file and copy it to the lib folder on the CIRCUITPY drive. Or, simply install the Adafruit bundle.

Read the docs for info on how to use it.

0.3.0

This requires CircuitPython 0.9.4+!

• Add option to clock SPI after a transaction.
• Switch to new BusDevice API.
• Switch to nativeio split APIs.

0.2.0

Updated docs and rename to CircuitPython.

Second attempt testing Travis CI release generation.

0.0.3

Update .travis.yml

Release to test Travis CI package generation

0.0.2

Add travis CI config for auto release generation.

Initial release for testing.

Initial release with .mpy version of code. Grab the attached .zip, open it, and copy the entire adafruit_bus_device folder and all its contents to the Adafruit MicroPython board. Be sure the directory and all files inside it are copied to the root of the board's filesystem!