More work on buildable piping

Manifolds, unary vents, scrubbers, manual valves, connectors, and pumps are now also makable
  testing has not been overly robust thus far
  Known issues:
    scrubbers don't seem to be able to grab nodes properly when constructed
    runtime errors if you try making a pipe/manifold that doesn't connect to an already-constructed atmos object
    corner pipe sections have a tendency to defy euclidian logic (most notable example has been a section of pipe that somehow had both ends tied to the same end of a different pipe section)
    Added a disposal pipe dispenser that had been sitting unused in the code to Atmos. No clue if it actually works, I know the regular pipe dispenser worked fine
    Did NOT add a pipe dispenser to the map, but it is there if admins want to spawn one

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@396 316c924e-a436-60f5-8080-3fe189b3f50e

code/ATMOSPHERICS/atmospherics.dm

@@ -14,6 +14,7 @@ obj/machinery/atmospherics
 	anchored = 1
 
 	var/initialize_directions = 0
+	var/color
 
 	process()
 		build_network()

code/ATMOSPHERICS/pipes.dm

@@ -6,7 +6,7 @@ obj/machinery/atmospherics/pipe
 	var/volume = 0
 	var/nodealert = 0
 
-	var/color
+
 
 	var/alert_pressure = 80*ONE_ATMOSPHERE
 		//minimum pressure before check_pressure(...) should be called