Set fluid flowing icons properly
More intelligent pipe side rendering
Ok, so client pipes do need to tick some stuff

Closes #1128
Wrenches shouldn't rotate Levers
Pipes shouldn't reorient if neighbor unloaded
Various usability tweaks to the refinery

Filters are now set automatically by the first fluid to be inserted. You
can reset them with a wrench Shift-Right Click.
Don't rotate buttons either!