#big int

Today I completed addition and subtraction. I also included a multiplication function. All combinations of positives, negatives, and zero are supported. Leading zeros are removed, and there is no such thing as negative zero. The multiplication algorithm is pretty naive and what one would learn in grade school. I didn't think the integers would be big enough to require more sophisticated algorithms. They are big-enough integers. Maybe at a later time.

I'm working on addition and subtraction for the big-int library. I made a little progress today, but more has to be done.

I worked more on the increment and decrement functions for the big integer library. Next I will do addition.