Very close to NeatTools and a new class

This seems to me to be very close to the way NeatTools handles the drawing of wires. The behavior may not be ideal, but, first step is to duplicate the existing interface.
Also, I’ve started creating subclasses of the Module class. The LED class is the first example of this, and for the moment the only differentiating feature of the LED subclass is when you click on it, it changes color. (This isn’t how the NeatTools LED object functions, I’m merely testing out the method of changing the color of the Module.