Shrimp Shader Generator FLTK2 GUI (SVN)

ENH: added rconstruct's texture tags to the renderer definition file

Renamed RSL's include tag to rsl_include

Updated Banks model for __nondiffuse and __nonspecular cases.

Fixed an wouwou in complex division (trying to store a vector in a float via cx_set), and order of functions (workaround for Aqsis, thanks Tobias Sauerwein).

Updated the shading models header for a fix in the geometric attenuation function of the Cook-Torrance model - the workaround for the Pixie spline() linear basis is no longer needed.

Updated blocks and examples to reflect the changes in the headers to the shrimp prefix.

To avoid potential problems with identically named headers, renamed them with a shrimp prefix.

Basic K-3D .slmeta files generated on scene export

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.