Vision

[droid-101]

This commit contains the follow additions:

• Image processing is done using OpenCV libraries
• Ringlight is used to increase colour on target's retroreflective tape
• Imgproc library used to isolate, outline, and then mask the target
• Using the centre of the captured frames, the horizontal distance from the target is calculated through pixel to metre scaling
• Using an empirically determined cubic formula, the distance is related to shooter speed to allow the robot to auto set a shooter speed at any distance