from the top, relegated grates to decorational-only, added outlet spigot. Got
rid of a few obsolete textures. Got rid of that whole _x and _z naming thing,
now all directional devices (pumps, valves, spigots, tanks) use facedir.
Valves, spigots no longer auto-rotate to find nearby pipes.
These devices can only be connected to horizontal pipes or to each other. Note
that only the device being placed and the pipes around it will adapt; if you
have a valve and pump next to one another and they won't connect, put a piece
of pipe at one end to show the auto-rotator which way they should go. Removal
of a pipe or device will not change the orientation of surrounding devices.
