Shrimp Shader Generator FLTK2 GUI (SVN)

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

Fix for Pixie (2.2.4) - storage variable is color type, but rimlighting returns a float, and an error was being reported. Workaround added.

New design for rolled blocks (origami like)

Occlusion and indirect diffuse are huge blocks - added the tag to display them as rolled up as default.

Added the new splash and about screens.

Adding a predefined block now supports 'rolled' tag

Added the Oren-Nayar-Wolff diffuse model block, and updated the shading models header for the respective functions.

Updated the Oren-Nayar block, and the illumination model headers, to add the option to use the full Oren-Nayar model with inter-reflections (3 coefficients), besides the qualitative model (2 coefficients) - model is chosen via apropriate variable in the block.

Fixed light projector space, fixed UV text in UV block.

Shading rate and pixel samples couldn't be stored as float values in the preferences dialog