Tentative polling added
Flush all data before attempting to read
Use a for loop, rather than some strange generator syntax
Use correct settings for the gps serial connection
Use a carriage return at the end of gps commands
added getting RMC line,
Switched tabulators to 4*spaces (could that cause the checksum problem?)
Merge branch 'polled-gps' of github.com:AberSailbot/sailbot2013 into polled-gps
Removed more tabs
Added _get_line method

Refactored gga and rmc getters to use it
Started writing waypoint manager
Finished adding correct constrains for setting the sail and rudder
Added method for distance to next waypoint
Added bearing method
Added moving to next waypoint
Added waypoint number property
Integrated gps position into waypoints

Added waypoints to Boat
Added waypoint events to emulator
Fixed missing _
Merge branch 'master' of github.com:AberSailbot/sailbot2013
Merge branch 'polled-gps'