Precious Metal v0.8

Added are: Rudder and elevator finished and animated, spinner size increased, number 38 added to both sides of vertical stabilizer.

To do: Gear animation, and finish adding painted items to fuselage and tail.

Any idea if the props are featherable in the real airplane? I think it's uncommon for the prop to be featherable in a single engine airplane, but this airplane has so much propeller that it glides like a brick at idle power.