Pipe rendering rewrite

- Complete rewrite of pipe rendering code. It now selects icons from a shared cache.
- Manifolds and other devices (pumps, filters, etc.) now match the color of the connected pipes.
- Updated omni devices to use the shared cache.
- Set separate pipe color definitions.
- Cleaned up a lot of pipe code, converting it to absolute paths and removing old commented out code.
- Tweaked t-ray rendering code.
- Tweaked pipe painter.
- Enhanced pipe checking debug command.
- Expanded tank capacity and resprited them.

code/ATMOSPHERICS/components/binary_devices/binary_atmos_base.dm

@@ -76,6 +76,7 @@ obj/machinery/atmospherics/binary
 				break
 
 		update_icon()
+		update_underlays()
 
 	build_network()
 		if(!network1 && node1)
@@ -127,4 +128,7 @@ obj/machinery/atmospherics/binary
 			del(network2)
 			node2 = null
 
+		update_icon()
+		update_underlays()
+
 		return null