AltitudeHold: tune the amount of tilt compensation

The existing code would still drop during forward flight,
because of the non-linearities of open loop ESCs. This
allows tuning the amount of tilt compensation.
AltitudeHold: make compensation amount a uint16

Being able to only go to the power 2.5 was insufficient to
maintain forward flight at steeper angles.
Updated tools.mk for compatibility with Mac OS 10.10
updated qt for all platforms
FlyingF4: Allow telemetry by default
Merge pull request #1219 from larsjohnsen/flyingf4_telemetry_fix

FlyingF4: Allow telemetry by default
osd: correct heading value for navi waypoint
Merge pull request #1216 from henkf/yosemite

Updated tools.mk for compatibility with Mac OS 10.10
Merge pull request #1171 from peabody124/tune_tilt_comp

AltitudeHold: tune the amount of tilt compensation
Merge pull request #1204 from strnadda/frskysport

FrSKY SmartPort UAVO bridge
Merge remote-tracking branch 'upstream/next' into draco