Adafruit-circuitpython-cap1188

Added global `sensitivity` and individually controllable `threshold`.

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-cap1188`.

Read the [docs](http://circuitpython.readthedocs.io/projects/cap1188/en/latest/) for info on how to use it.

- Changed CS to be `D5` instead of `D10`

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-cap1188`.

Read the [docs](http://circuitpython.readthedocs.io/projects/cap1188/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-cap1188`.

Read the [docs](http://circuitpython.readthedocs.io/projects/cap1188/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).

Read the [docs](http://circuitpython.readthedocs.io/projects/cap1188/en/latest/) for info on how to use it.