Adding OSLBSDF and CompositeClosure implementation.
Merge branch 'master' into OSL_merge
Small changes.
Renamed some CompositeClosure methods
Merge branch 'master' into OSL_merge
Merge branch 'master' into OSL_merge
Small formatting and correctness fixes.
Fixed errors and small formatting changes.
Merge branch 'master' into OSL_merge
Merge branch 'master' into OSL_merge
Fixed PR, added osl material factory, exec OSL shaders in shadercontext
Merge branch 'master' into OSL_merge
Added code to exec OSL shaders.
Merge pull request #303 from est77/OSL_merge

OSL merge 9