Cycles / Passes:
* Some closures (Toon, Diffuse Ramp) were not assigned to a CLOSURE_IS_* define, which made them invisible on render passes.
* Westin closures had wrong type, Sheen is Diffuse, Backscatter is Glossy.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57047 954f8c5b-7b00-dc11-b283-0030488c597c