wip, arducopter hil model and protocol
Merge remote-tracking branch 'upstream/master' into hil_quad

Conflicts:
	src/comm/QGCFlightGearLink.cc
fgfs: quad protocol: remove indicated airspeed
flightgear arducopter model: change y motor position sign
Merge remote-tracking branch 'upstream/master' into hil_quad
Merge remote-tracking branch 'upstream/master' into hil_quad
Merge remote-tracking branch 'upstream/master' into hil_quad
Merge remote-tracking branch 'thomas/hil_quad' into hil_quad
fgfs arducopter model: fix indentation
arducopter.xml: whitespace
Merge pull request #734 from thomasgubler/hil_quad

FGFS multicopter HIL