[CR] Biodiesel engine

Added biodiesel engine. Not too sure on some of the numbers though so any input would be great :) That said, this engine should be louder and slightly more powerful than a normal gasoline v8 engine.

You may find deep fryers filled with cooking oil in some fast food restaurants.

New Item: Biodiesel engine
New fuel: Biodiesel
New vehicle parts: Biodiesel engine, biodiesel tank
New furniture: Deep fryer
New recipe: biodiesel - requires chemistry set, 2 charges of cooking oil, and 50 charges of lye powder