Igcs 203 ar drone tilt control

The important change is the sendMoveCommand method in the iGCS/Comm/Interfaces/iGCS/iGCSMavLinkInterface.* files.  The rest was to support testing this new method.
Bryan asked "If all the brackets are in the right place" so now I have to comment on them. Blame him. Please put the else if on the same line. You can add an extra space after the body if you like.