Adafruit-circuitpython-tcs34725

* Update for removal of `stop` kwarg. ([more info](https://github.com/adafruit/circuitpython/issues/2082))

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-tcs34725`.

Read the [docs](http://circuitpython.readthedocs.io/projects/tcs34725/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-tcs34725`.

Read the [docs](http://circuitpython.readthedocs.io/projects/tcs34725/en/latest/) for info on how to use it.

* `lux` and `color_temperature` are now provided via Application Note: DN40-Rev 1.0 – Lux and CCT
Calculations using ams Color Sensors.

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-tcs34725`.

Read the [docs](http://circuitpython.readthedocs.io/projects/tcs34725/en/latest/) for info on how to use it.

- Resolve divide by zero and 8-bit overflow conditions.

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-tcs34725`.

Read the [docs](http://circuitpython.readthedocs.io/projects/tcs34725/en/latest/) for info on how to use it.

- Adds a color property that complies with style guide.

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-tcs34725`.

Read the [docs](http://circuitpython.readthedocs.io/projects/tcs34725/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-tcs34725`.

Read the [docs](http://circuitpython.readthedocs.io/projects/tcs34725/en/latest/) for info on how to use it.