Added GL FacingRatio shader
Added GL FacingRatio shader

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