TGE water upgrades

I opened this thread to stop hijacking that other one in the TSE public forums.

We had to prototype a watersports game, and chose TGE over TSE, adding shader support to the waterblock render, since that way the game wouldn't require a shader capable GPU, but would display a nicer water on supporting hardware, to prevent the game from looking too dated.

I took the "bumpmapped interiors" resource as a start point to add CG shaders support to TGE, modified the fluidRender to load and use vertex and fragment shaders, and modified the GameTSCtrl so I could use a smaller one, placed behind the main GameTSCtrl, to render the reflection to a texture. But with some changes on the .CG files, it's possible to use the ol' spherical map instead of a scene reflection, if performance is a concern.

It looks like the TSE water in motion, with 3 major differences:
- There's no refraction (would bring the performance further down, but could be added).
- No specular yet (easy to add by passing the light direction to the shader).
- It uses the depth mask, just like normal waterblocks (fake depth cueing).

I will post this as a resource, and got as far as take it apart from my own codebase and install it in a TLK source tree. There's only a couple bugs and commenting I need to sort out before it becomes usable.

Screenies:

The CG support was implemented on the windows build only (we aren't really making multi-platform games yet), but CG is supposed to be multi-platform, so people experienced in working on OSX and Linux could get it to work in those platforms as well.