fixed update bug in sensor interface, cleanup

fixed issue where the module would send multiple grapevine messages for every packet received. Also cleaned up, removed some old, unused code.
added cmdline args to uc sensor grapevine interface
added cmdline args to uc sensor debugging interface
added cmdline args to thruster debugging interface
added cmdline args to thruster grapevine interface
added cmdline args to uc LED debug interface
added cmd line args to uc LED grapevine interface
added sigint handler to uc LED debug interface