Shrimp Shader Generator FLTK2 GUI (SVN)

Removed the workaround for Pixie and the He-Torrance geometric attenuation function, since the spline() shadeop is now fixed (thanks Okan Arikan).

Fixed the example scenes, since some blocks had been updated, and the example scenes didn't reflected this.

Updated the wood example scene, since it had retained the old transform block syntax, and there was a problem with the preprocessor directives when deciding when to use vtransform, ntransform, or transform.

Fixed declaration of loop counter in Granier-Heidrich model.

Fixed Granier-Heidrich BRDF, there was an lightsource() left out of the illuminance() construct. Rewrote the accumulators and the respective AOVs.

Added comment to the Lafortune model - no longer causes Pixie to crash.

Added some comments to the shading models header; Fixed an stray lightsource() that was left outside an illuminance() construct. Added some types clarifications to avoid confusions with some shader compilers, and some other minor fixes.

Default the glass block into rolled up state.

Fur block defaults to rolled up state.

Fix added for Phong-Blinn block, Pixie didn't liked the block identifier.