Created a new differential_odometry package which replaces encoder_to_odom and encoder_and_imu_to_odom. Launch files are updated accordingly.
vectornav_vn100_node: Changed coordinate reference to default to East North Up (ENU).
Implemented straight driving in position action server
Added topcon initialiser node
Updated launchfile in sdu_pichi_surveyor
Added support for fixed number of fields to serial_nmea node
Moved and renamed topcon_gnss_setup. Updated to contain up to three strings
Updated gitignore to allow local submodules
Updated .gitignore
executive_smach and joystick_drivers are now included as submodules
Added Doxyfile to frobit
Added support for empty fields and checksum on outgoing messages
Added tester to serial_nmea
Corrected doxygen info in sdu_frobit
Added sdu_pichi_remote package
Merge pull request #8 from FroboMind-SDU/master

Updates from SDU