Added female crew member

Added the human_female crew member and animations.
Added Zoltan crew member

Added the Zoltan crew member with animations to init.lua.
Added Mantis crew members

Updated init.lua to include mantis crew members.  Also, normalized the
stand animation to be .stand for all races.
Added Rockman crew member

Updated init.lua to include rock crew members.  Note that some races
will have differant animation commands (die and extinguish do not have
directions for rockmen.)
Added Engi crew member

Updated init.lua to include Engi crew member animations.
Added Slug Crew member

Updated init.lua to include slug crew member animations.
Added Crystal crew member

Updated init.lua to include crystal crew member animations.  Also fixed
unnecesary redeclaration of crew member variable.
Added droid crew members

Wasn't sure how to treat droids that interact with the ship, so for now
they are crew members.  Their glow does not work yet.