General cleanup based on the pull request from muggenhor
Reformatting.
First steps to supporting GPS
More changes.
Merge remote-tracking branch 'upstream/master' into hott_v2
Add some GPS data to telemetry message.
GPS support - mostly working.
Merged new repository layout from PX4/Firmware
Fixed bug in UBX::configure_message_rate()
Merge pull request #292 from DrTon/ubx_msg_rate_fix

Fixed bug in UBX::configure_message_rate()
Completed main implementation and debugging
Fix whitespace
Formatting and comments
Removed some debugging code
Merge pull request #294 from sjwilks/hott_v2

Add GPS Support to the HoTT Telemetry driver
Merge branch 'master' of github.com:PX4/Firmware into failsafe_io
Better error handling for too large arguments