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This was a bit sloppy, I changed a lot things since the last commit. The script talks to garmin gps units now but needs to be run as sudo. GPS settings and cruise info have been relocated to outboard subroutines. Still need to write the sign of longitude and latitude and to write them out to the data file.

Initial commit. Still need to implement writing to the outfile, formatting comments, suppressing STDIN for comments, and writing operations and stations to the file header before we can call this functionnal. It is also still pretty ugly.