cv_camera_mod

Add camera auto_exposure setting to original cv_camera. Now you can set the exposure manually like this:

rosrun cv_camera cv_camera_node _cv_cap_prop_auto_exposure:=0.25 _cv_cap_prop_exposure:=0.01

Or, set it back to auto_exposure:

rosrun cv_camera cv_camera_node _cv_cap_prop_auto_exposure:=0.75