conf.py : Correct Arnold and 3Delight versions
conf.py : Correct Arnold and 3Delight versions

andrewkaufman/gaffer,andrewkaufman/gaffer,boberfly/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,boberfly/gaffer,lucienfostier/gaffer,johnhaddon/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,hradec/gaffer,appleseedhq/gaffer,boberfly/gaffer,andrewkaufman/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,hradec/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,hradec/gaffer,lucienfostier/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,hradec/gaffer,appleseedhq/gaffer,lucienfostier/gaffer,boberfly/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,hradec/gaffer,johnhaddon/gaffer