Started using stations

Just a temporary implementation, but stations now have an occupancy
table that shows whether a room such as 'quarters' or a sub-room like
'quarters_a' are occupied.

A few minor changes to ship and crew to accommodate this, and a method
on Crew that returns a random name.
Crew does the following: work, porn, wander

Implemented methods like getLocation on task, so that crew choose their
locations and sub-locations from the available stations. Lots of code in
Crew is commented out for now.
Merge branch 'master' into crew_update_loop

Conflicts:
	game/classes/crew_class.lua
Merge branch 'crew_update_loop' into anims
Ghosts of people at their destinations
Merge pull request #16 from ZNCatlaw/anims

Anims