Lunar Shuttle facelift

Finally this one's ready to replace that simple old model with something more defined.
Two lods at 4700 and 2000 tris.
Collision mesh and shield.
1024* dds diff texture, 512* spec, glow and one pattern. The pattern is quite simplistic, I have to come up with some better ones later.

I didn't touched the ship.lua, so the specs are the same. (no savegame problems I'd guess). So still not the best ship around to have.

![screenshot-20141019-213814](https://cloud.githubusercontent.com/assets/4182678/4694477/4941f84c-57ca-11e4-8042-88f23732f8f3.png)
![screenshot-20141019-213819](https://cloud.githubusercontent.com/assets/4182678/4694471/226ec1e6-57ca-11e4-8e5f-d0d8ece05d4a.png)
![screenshot-20141019-213833](https://cloud.githubusercontent.com/assets/4182678/4694472/2eb606d0-57ca-11e4-9acc-f66ff716cef8.png)
![screenshot-20141019-220054](https://cloud.githubusercontent.com/assets/4182678/4694486/b2a45410-57ca-11e4-8f6a-c4dddd3a9e0b.png)