files for alpha version of rust fusion reactor.

rust integrated into antiqua, no breakroom.
lots of fusion bugs, missing features and imbas but it works.

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

code/defines/procs/helpers.dm

@@ -1588,3 +1588,22 @@ proc/get_opposite(var/checkdir)
 		if(a == character)
 			count++
 	return count
+
+/proc/reverse_direction(var/dir)
+	switch(dir)
+		if(NORTH)
+			return SOUTH
+		if(NORTHEAST)
+			return SOUTHWEST
+		if(EAST)
+			return WEST
+		if(SOUTHEAST)
+			return NORTHWEST
+		if(SOUTH)
+			return NORTH
+		if(SOUTHWEST)
+			return NORTHEAST
+		if(WEST)
+			return EAST
+		if(NORTHWEST)
+			return SOUTHEAST