ShaderGroups don't need a searchpath anymore when using OSL's new introspection calls.
OSL refactors for emission.
enable OSL statistics always.
Merge branch 'master' into est_OSL
Starting emission work.
Added Disney BRDF to OSL BSDF list.
OSL emission working.
Merge pull request #554 from est77/master

OSL fixes and improvements.
Merge remote-tracking branch 'upstream/master' into est_OSL
Fixed PR comments.
Fixed PR comments.
Merge pull request #552 from est77/est_OSL

OSL emission + refactors and fixes