Shrimp Shader Generator FLTK2 GUI (SVN)

ENH: array support in the 'Edit Input' dialog and shader_block structure

NEW: array's user interface in the 'Add Input' dialog

ENH: split the scene_view::handle() function

PRMan doesn't accepts Ol global variable (light opacity). Add workaround so that generated light shaders don't output Ol.

Fixed typo in Stanford Buddha container scene (Attribute).
Fixed missing control points in spline() in the lichen example scene.

Fixed camera position in Stanford Dragon container RIB.

Fixed remaining RIB scenes. Added updated Stanford Dragon scene.

Added Clipping to the Shrimp generated RIB, and fixed Quantization. Added archives/ directory with preview objects (read in main scene via ReadArchive). Tweaked main "container" scenes. RIB archives (Stanford Dragon, Stanford Buddha, Stanford Bunny, and background box) by Uros Simic.

Cleaned up the RIB generation, added some extra options, such as searchpath defaults, and other RI statements. Prepared for the cleaned up RIBs.

Changed shTile x/y frequency to uniform storage in xml block (as in shapes header). Updated bakeptc example (forgo tto disable rasterorient dicing), and added DisplayChannel "float occlusion" to the bakeptc example's RIB root block. Fixed ternary operator expression in glass model when choosing between glossy or specularbrdf().