Also new texture for the Laser Crafting Table and fixed a bug with Wooden Item Pipes not diplaying items that are being pumped.
Emerald Pipes are advanced versions of the Wooden Pipes. The Item Pipe posseses a filter that pulls items from inventories in a blocking Round Robin fashion. The Liquid Pipe has capacity and flow rate equal to a golden pipe.
Note: ISpecial and ISelective Inventory interaction with the Emerald Item Pipes is untested, there seems to be nothing decent to test with in Buildcraft. (commit: e63402b)