Bells and Whistles and Genome Visuals

I've added more stuff to the GUI, just small things that show the
probabilities for runtime weight "add" and "delete" mutations.

Also, sexual reproduction only seems to throw exceptions when my
computer is plugged in... what? Anyway, that's been enabled again.

Finally, I came across a case that I did not expect: connections
targeting connections targeting connections! Of course, I hadn't thought
of this when extending graph visualization code so I had some weird
stuff happening. Anyway, I fixed this so that's been taken care of.

To see what I was talking about in the last paragraph, load a seed
genome (SharpNeatGUI/bin/Release/missing_endpoint.gnm.xml) for the
And-Or-Modular experiment and look at the genome structure.