Adafruit-circuitpython-si7021

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-si7021`.

Read the [docs](http://circuitpython.readthedocs.io/projects/si7021/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-si7021`.

Read the [docs](http://circuitpython.readthedocs.io/projects/si7021/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-si7021`.

Read the [docs](http://circuitpython.readthedocs.io/projects/si7021/en/latest/) for info on how to use it.

After discuiion with deshipu and dhalbert implemented changes to _init_ and _data to accept all OSErrors during reset. Apparently changed from CP 2.x to 3.x resulted in different responses. This approach is consistent with other drivers such as bno055

Re-bundling so we use the right travis tools

tannewt linted and updated travis for auto-genning mpy + bundling

To use in CircuitPython, simply install the Adafruit CircuitPython bundle or the zip from here that matches the version of CircuitPython you are using.