moved the code that converts the value sent in a mavlink param message
from ArduCopter/GCS_MAVLink.pde to libraries/GCS_MAVLink/ to make it
available to the other (currently wrong) GCS_MAVLink.pde files
*/GCS_MAVLink.pde:
	fixed implementation of mavlink parameter protocol
	
libraries/GCS_MAVLink/
	removed unused mav_var_type function