Worked on Signal code - IN PROGRESS

Still making progress on the Signal code. The Test_Signal has not been
verified yet. I added a variable TVO to keep track of overflows and give
better precision, but I'm not sure if it works yet.
More Pin Updates - Signal

Updated pin assignments to include the Zero-Cross circuit pins
Square Wave Generator

Generates a square wave from the board so that we can test our
transmitter.

Progress on the transmitter has been alright, we managed to get to 20V
tonight but we need more for greater distance.