Creating GraphCollection Class - Basic creation

Basically made this entire thing in one sitting. It's almost the exact
same idea as EdgeLinkedList, except I didn't really bother with
backpointers. Everything works pretty much immediately. I included the
debugging statements to show that it works.

I want to add duplicate checking. I don't want multiple copies of the
same graph being able to be added into the class. I'll add that next. It
won't throw an error, it'll just have the addGraph function return
false.