Adafruit-circuitpython-bmp280

* Fix crash when raising chip id error. Thanks to dhalbert !

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/bmp280/en/latest/) for info on how to use it.

Thanks to sommersoft for the great work!

Re-bundling so we use the right travis tools

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

**note** updated seaLevelhPa member variable to sea_level_pressure - check examples for new demo!

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

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