Lizard stuff

Here's some of the differentiation-stuff I was talking about on the forums.  It's intended to break the Lizard category out a bit, reduce crossover, etc.

In particular, the new eyes make IR vision reasonably achievable with less mutagen use and add flavor.  The Tail is perhaps a bit nicer than necessary, but we can discuss that.

Got a fair amount more like these in the tank if people want 'em.