Initial commit after moving to unary stack
Renamed the driver and commented out the GPS time stuff. Until the GPS
time message review is complete, we'll leave that out.
Refactored the nmea_gps_driver a bunch and added support for the GGA
sentence
Updated to include TimeReference output
Removing the GPSTime message. Replaced it with sensor_msgs/TimeReference
Updated the authorship and maintainer information
Added the BSD license text
Added description to the stack.xml
Fix a typo
Slight update to the package description
Added tf_prefix support
Slight fix for tf_prefix stuff
Fixed bug with tf_prefix where could get frame_id's like '//gps'
Added checksum calculation and checking
Now properly setting the timeref.source to the time_ref_source parameter
Added catch statement for the ValueError thrown when the NMEA sentence's
fields are empty and we try to convert to float. Fixes Bug #2.
Updated to reflect API reviewed status
Start this stack at 0.2.0
Added a .gitignore file
Checksum checking was failing if the sentence did not have the checksum * character

This fixes KForge ticket #4
https://kforge.ros.org/gpsdrivers/trac/ticket/4