Fixing the AI bias towards hoomins

Changes cases of 'human' to crew member, to prevent specieism and also because the law specifies crew members to prevent the headbanging situation I had to deal with as Mendicant earlier. It now applies to crew - exactly the same as before only the AI can't wiggle out of not killing Unathi. Antags are the same as before.
Pank.
DAMMITDAMMITDAMMIT AAAAAAGH FIXED