'Improved' sky for SoM

[dmpdesign]

In short, john created an entirely new model set with several layers and such to improve the very generic 256x256 texture limitation of the current model.

In his download file there is a very nicely laid out explanation of all the layers, how to configure them and how they are used..would probably be easier just to read from that than try to respell it out here.

Once john is totally satisfied with his new sky tool kit, I will make a section for its use on the main site outlining everything in his detailed document.