Simple Copper Pipes

What's New:

Copper Pipes can now be oxidized, waxed, and unoxidized if they have items in them! The previous solution of having the pipe wait until it had no items was temporary, I finally figured out how to get this working right.

Copper Pipes oxidize slower than they did previously.

Bug Fixes:

Fixed multiple crashed caused by mixins.

Waxed Copper Pipes now drop the correct item.