Comment out noisy warning

QGCCameraControl::storageFreeStr(): use QGCMapEngine::storageFreeSizeToString()

Map gimbal controls
Keep track of gimbal position within Vehicle

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Keep track of recording time if camera doesn't provide it.
Make sure camera info is received (if camera ACKs the request)
Keep track of camera's heartbeat. Remove camera if not heard from after a while.
Update MAVLink

Add "known" parameters to camera controller.