[victor]

Following changes are included:

· Support for additional map types: bump, reflection, glossiness, opacity, specular, emitter.
· SketchUp sun/shadow information is taken from SketchUp directly (no need to use Ruby plugin every time the shadow info has changed)
· SketchUp Background color is supported in SkyDome environment
· If multiple faces are selected and check material type is invoked the Ruby scripts report the material of the first selected entity and if materials of some other selected entities differ this fact is reported as well. Script no longer displays the message dialog for every selected entity.
· Optimization - the export was partially optimized to shorten the export times
· Bug on Win2000 - export on Win2000 caused crash if any parameters were set using Ruby script
· Emitter material fix
· Plastic material fix