added contours so the ball tracking is awesome
Sample Python TCP server added.

Can be used as a basis for communication between BBB and cRIO.
changed the ip of tcpserver and edited ball.py so it responds faster to prompts from the crio
Turned ball.py into class to make development easier.

Class BallFinder now only does the vision processing, meaning that the algorithm
can be used on board the BBB and for development with a monitor.

A helper function is used to call the class and plot it on screen when used from the command line.
Much neater implementation.