Walking Power Armors

Ok, so this is more of a suggestion. Maybe D-T offered to use power armors, with OS'es in them, connected to the mainframe, in order to suppress the zombie invasion. This addition, if the spawn rates would be increased, would make labs much more dangerous. If I get positive feedback, I'll try to expand this to the other PA's, and possibly add new robots.
For now:
+mon_walk_harmor: A walking heavy power armor, with it's stats.
+death group for above
+spawn for above

(Ignore commits on concrete, error on master branch of mine.)