Fixed issue 287, 290, 291

-Cutting/restoring cameras now leaves a print
-building certain overly-abused griff items leaves prints
-grenade launcher no longer shoots your face if you try to backpack it

Chameleon projector movement speed is now based on temperature
Added add_hiddenprint(mob) proc
it's like add_fingerprint but only adds to fingerprintshidden isn't that neat?

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@2898 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/objects/devices/chameleonproj.dm

@@ -25,7 +25,17 @@
 	relaymove(var/mob/user, direction)
 		if(can_move)
 			can_move = 0
-			spawn(10) can_move = 1
+			switch(usr.bodytemperature)
+				if(300 to INFINITY)
+					spawn(10) can_move = 1
+				if(295 to 300)
+					spawn(13) can_move = 1
+				if(280 to 295)
+					spawn(16) can_move = 1
+				if(260 to 280)
+					spawn(20) can_move = 1
+				else
+					spawn(25) can_move = 1
 			step(src,direction)
 		return