Adafruit-circuitpython-bme280

- Updated to use specific version of `pylint`
- Updated `.travis.yml`

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-bme280`.

Read the [docs](https://circuitpython.readthedocs.io/projects/bme280/en/latest/) for info on how to use it.

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).

To use in CPython, `pip install adafruit-circuitpython-bme280`.

Read the [docs](https://circuitpython.readthedocs.io/projects/bme280/en/latest/) for info on how to use it.

Thanks to sommersoft for the great work!

2.0 Release with binaries for CircuitPython 2.x (note this might not work with CircuitPython 3.0+!).