Bug Fix - Base would not destroy

OK, fixed a HUGE mistake that was caught (and created) by Magnet  :)  .
Bases factories now take 3 minutes to build (done automatically) and
after they're destroyed by an enemy will disappear after 5 min if not
repaired.   Added the HAMR site to OPFOR and removed the darter from
spawning @ air fact; it doesn't spawn with gas or can't be controlled
oddly enough.