Change the RosVision class name

[garethellis0]

Currently, our vision filtering and IPM filtering node is called ros_vision with a class name of RosVision. This could probably have a better name, like vision_processing and VisionProcessing.

What needs to be done:

• in src/vision/ros_vision.cpp rename the node from ros_vision to something better
• change the RosVision class name to something better (should follow the node name)
• change all relevant file names.
• test changes by running them in gazebo, or on the robot. This is really important, as this is an older portion of the codebase, and so is not unit tested

[ValRat]

RosVision is no more, closed with Robyn's amazing changes.