Adafruit-circuitpython-pca9685

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip install adafruit-circuitpython-pca9685`.

Read the [docs](http://circuitpython.readthedocs.io/projects/pca9685/en/latest/) for info on how to use it.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip install adafruit-circuitpython-pca9685`.

Read the [docs](http://circuitpython.readthedocs.io/projects/pca9685/en/latest/) for info on how to use it.

- Added `setup.py`
- Added PyPI release info to `.travis.yml`
- Updated `requirements.txt`
- Added a more comprehensive `.gitignore`

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip install adafruit-circuitpython-pca9685`.

Read the [docs](http://circuitpython.readthedocs.io/projects/pca9685/en/latest/) for info on how to use it.

Thanks to sommersoft for the documentation refinement.

To use in CircuitPython, download the .mpy file and copy it to the `lib` folder on the `CIRCUITPY` drive. Or, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

Read the [docs](http://circuitpython.readthedocs.io/projects/pca9685/en/latest/) for info on how to use it.

3.0.0 reworks the PCA9685 API to work just like CircuitPython's built in PWMOut objects by having `duty_cycle` and `frequency` properties for each channel object.

Servo and motor related class have moved to a new library that can work with any PWM output here: https://github.com/adafruit/Adafruit_CircuitPython_Motor The examples use PCA9685 so take a look [at those](https://github.com/adafruit/Adafruit_CircuitPython_Motor/tree/master/examples).

Lastly, the code that helps initialize `Motor` and `Stepper` objects for the Motor Featherwing is now [here](https://github.com/adafruit/Adafruit_CircuitPython_FeatherWing/blob/master/adafruit_featherwing/motor_featherwing.py) in the Adafruit FeatherWing library. Docs for it are [here](https://circuitpython.readthedocs.io/projects/featherwing/en/latest/api.html)

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To use in CircuitPython, download the .zip file and copy its contents to the `lib` folder on the `CIRCUITPY` drive. Or, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Addafruit_CircuitPython_Bundle).

Read the [docs](https://circuitpython.readthedocs.io/projects/pca9685/en/latest/) for info on how to use it.