New APM code for stabilization and depth hold on the BlueROV

Hi John,

Using the RPI and UDP can be set up with virtually no noticeable video latency at all. The video feeds directly into qgc.

Take a look at these posts (27th feb) on Downunder ROV build

and 17th (Feb) on ArduSub submodules

Happy to provide more detail if you want to go down that track

Andrew