removes nmea_navsat_driver files
adds nmea_navsat_driver as submodule
changed nmea_navsat_driver submodule to point to newest HDT commits
creates new line_detection file to test out gabor_filter. Runs successfully, but no idea how good of a filter it is for our purposes
oops gabor_theta should be converted from degrees to radians
applies backprojection first, then blurs, then applies gabor filter. looks pretty good
comments out old code and removes unneeded parameters
adds hough line transform and dynamic reconfigure parameters. Removes backprojection and replaces it with global threshold.
gabor filter now takes in raw ros images as input. Output is still compressed images.
adds roi in dynamic reconfigure
adds launch file for gabor linedetection
Merge branch 'line_detection' into development

Conflicts:
	nmea_navsat_driver
Merge branch 'development' into travis

Conflicts:
	nmea_navsat_driver