Changes

Added Quartz Pipes

Item and Power.

Item Pipe won't connect to Stone or Cobblestone and has half the
friction of Stone.

Power Pipe takes the place of Gold (64 MJ/t) and bumps Gold and Diamond
up to 256 MJ/t and 1024 MJ/t respectively. Expanding the upper tier
power distribution capacity.

Various textures adjusted to keep pipes distinct.
 (commit: ad2ead2)