Adding the main program, and included methods.

Unfortunately, a branch was created and didn't contain my initial
commits when I switched to my desktop git application; however, this
includes a drawn board, and the logical win to tic tac toe, which is
adding integers arranged in a specific order to equate 15.
Added extensive AI description

I have a list of tuples which contain the winning sets. Currently the AI
is popping all the selections done from the list by the player, and
choosing whichever scenario is most likely to happen. From the three
possible choices--minus any that have been popped--the ai choices the
remaing.

This should always lead to a tie.

NOTE: With that logic, I can definitely shorten the code instead of the
algorithm route I was originally going to take.