[CR] Roadblocks

I hated to leave that stash code sitting around unused, and given martial law and other similar counterinsurgency/zed-containment issues, roadblocks seemed an obvious solution.

Also includes a new turret and Upgraded high-end military bots.  Hopefully you've got a spare LAW sitting around.
+1 to "A laser dot starts to move across your torso/head" message.