* Added QAV-R (raceblade) 5".

* Added I gain for qav-r.

Signed-off-by: Roman <bapstr@ethz.ch>

Signed-off-by: Roman <bapstr@ethz.ch>

We need to make this timestamp relative to the main timestamp. Necessary
for replay, and saves some space.

timestamp was unused. This allows to remove timestamp_position.

* mavlink receiver: added handling of battery status

handle incoming battery status messages in order to support external
battery monitoring

Signed-off-by: Roman <bapstr@ethz.ch>

* sensor params: added parameter for battery monitoring source

Signed-off-by: Roman <bapstr@ethz.ch>

* sensors: only publish battery status if we don't have external battery
monitoring activated

Signed-off-by: Roman <bapstr@ethz.ch>

* Update default parameters for TBS Caipirinha

* reverse channel 0 doesn't exist