Now i have a 3rd camera! It is on the robot and gets its position
and orientation from the robot, during the update calback inside
robotdata.
It is rendered off screen and is not visable during the simulation.
for now the resolution is 800 to 600 pixel. But that might change.

WARNING: When using this build on PC, change the local_settings.h
according to the values needed by the simulation!

Also the 3rd camera can now be tilted backwards.

I realy need to clean up the source a bit !