Shrimp Shader Generator FLTK2 GUI (SVN)

FIX: comments in shaders

ENH: added missing Atuhors field in the scene; shader properties are exported as comments in the RIB file

ENH: type_extension serialization

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.