BMW Z4 - 3.0 CSL Tribute Skin 1.2

Added a black version. The white version should be unaffected.

This is likely the last update I will make to the skin unless I find a mistake.

So apparently, the tinting on the side windows affects the visibility from the inside of the car. The front and rear window tint doesn't, which is weird. This update changes the side window tint to match the value used by the default skins.

Added a version with sponsors and fixed a minor error in the first version. Also tinted the glass on the headlights, windows, and taillights to various degrees. Now, the only major differences are the rear wing and the red on the windows. I could make the rear wing white but I won't be able to put any writing on it (at least I don't know a way currently).

I might make a black version of this skin at a later date if I feel like it.