Change strings to bytes for 'pyserial' cross compatibility

This library now works with 'pyserial', includes some example code and CPython compatibility changes. Also added an optional debug flag.

To use in CircuitPython, simply install the Adafruit CircuitPython bundle.

To use in CPython, pip install adafruit-circuitpython-gps.

Read the docs for info on how to use it.

Now on PyPi!

• 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.

To use in CPython, pip install adafruit-circuitpython-gps.

Read the docs for info on how to use it.

Time tweaks

• Make time_struct have int values rather than float. Thanks to @cefn !

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.

Read the docs for info on how to use it.

Improved reference documentation.

Thanks to @sommersoft for the great work!

Updated with lint and autobundling!

Thanks to @mrmcwethy for the great work!

2.0 Release for CircuitPython 2.x

Initial release with binary for CircuitPython 2.x releases (note this might not work with 3.0+!).