Fixed OSLRenderer for compilation for OSL version 1.5.
Fixed OSLRenderer for compilation for OSL version 1.5.

This version changed the signatures of many of the virtual methods that RendererServices must implement.

hradec/gaffer,cedriclaunay/gaffer,hradec/gaffer,johnhaddon/gaffer,appleseedhq/gaffer,andrewkaufman/gaffer,chippey/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,chippey/gaffer,GafferHQ/gaffer,ivanimanishi/gaffer,boberfly/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,cedriclaunay/gaffer,andrewkaufman/gaffer,ivanimanishi/gaffer,appleseedhq/gaffer,chippey/gaffer,johnhaddon/gaffer,goddardl/gaffer,lucienfostier/gaffer,hradec/gaffer,boberfly/gaffer,lucienfostier/gaffer,cedriclaunay/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer,boberfly/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,chippey/gaffer,ImageEngine/gaffer,goddardl/gaffer,goddardl/gaffer,lucienfostier/gaffer,goddardl/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,cedriclaunay/gaffer,appleseedhq/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,hradec/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer,boberfly/gaffer,GafferHQ/gaffer,hradec/gaffer