Removed dx100 package in preparation for common fs/dx driver
Renamed fs100 package to motoman_driver.  The new package now contains drivers for all controllers.  Package name reflects new naming convention
Changed generated package files from fs100 to motoman_driver
Separated dx/fs driver nodes
Refactored launch files to mimic fanuc stack
Refactored launch files to mimic fanuc stack(files missed in last commit)
Changed directory name from fs100 to motoman_driver
Modified arm navigation to take controller argument (either fs100 or dx100)