Cleans up some of the code

There is now a "mutants_with_eyes" list, and a "colored_mutraces" list.
This should hopefully trim down the clutter in the code.

Also, added podpeople and jellypeople to the admin 'choose mutantrace'
feature on the player variables panel.
Tweaks jellypeople icon

Fixes up some oddities within the sprite, so they look a bit nicer.