GroveGPS module

Dependents:   Tests_GPS

This pull request has been rejected by Michael Ray

Added features to your program

Michael, I used your code as a base for a mbed cloud demo to show live GPS. I added date points like altitude and made a framework to send the NEMA commands needed to enable features like course/speed and day/month/year. Since I'm just a sales guy it may need some polish

Improved, thread compatible. Adds new features