moved a bunch of helper functions from human.dm to new file human_helpers.dm, added two mob helpers to check for mutations and mutantraces

Signed-off-by: Cael_Aislinn <cael_aislinn@yahoo.com.au>
adds laser pointers (blind humans, stun borgs, emp cameras), makes RD + lawyer + librarian spawn with one in their pockets, adds laser pointer as a steal objective

Signed-off-by: Cael_Aislinn <cael_aislinn@yahoo.com.au>