Removed pynmea from Gps. Added a response splitter
Added degree/minute -> decimal degree converter
Added a checksum method to Gps
Added a docstring to a method in Gps
Fixed indentation problems and added a docstring
Updated boat.py to reflect the changes made in Gps
Removed pynmea
Fixed the string representation of Point
Updated the imagined api example to use Point
Merge branch 'remove-pynmea'