Example file had its name change and comes up missing now #13
Description
Hello!
The example listed at the bottom of the readme, located here (https://github.com/PX4/sitl_gazebo/blob/master/src/gazebo_opticalFlow_plugin.cpp#L141-L195), appears to have had its name changed from opticalFlow to opticalflow ... the old unix case sensitive file names. Maybe you could add a simple example right into this repo?