Added robot_mask package

With this package, it is possible to get a binary mask that corresponds
to the robot from a specific (camera) frame.
Added fixed frame ros parameter
Made robot_mask c-turtle compatible
Set MIRROR parameter in robot-mask node
deprecated stuff fixe for robot-mask package

we should probably just get rid of this...
Moved ROBOT_MASK from CRAM_PHYSICS here preserving history.
Moved VISIBILITY_COSTMAP here from CRAM_PHYSICS.