to higher quality. Way more polys than before, but
without a measurable drop in FPS.
Also tweaked the textures for the pump and flow
sensor, and tweaked the low-poly models for them,
so that low-poly models use a different part of
the texture for the "light" on the side (allows
the higher-poly models to just put a glow there
and use a raised dome for the actual light).
Also fixed a Z-fighting issue with the grating on
the bottom of the pump (both versions)
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.
