Added Dimension.parent; is_flat and has_details is forwarded to the parent if exists
Added Dimension.parent; is_flat and has_details is forwarded to the parent if exists

This addition is necessary for dimensions that are created by limiting
hierarchies and levels when they become single-attribute dimensions.

she11c0de/cubes,ubreddy/cubes,ubreddy/cubes,pombredanne/cubes,noyeitan/cubes,jell0720/cubes,jell0720/cubes,cesarmarinhorj/cubes,pombredanne/cubes,cesarmarinhorj/cubes,jell0720/cubes,pombredanne/cubes,cesarmarinhorj/cubes,noyeitan/cubes,zejn/cubes,she11c0de/cubes,zejn/cubes,zejn/cubes,noyeitan/cubes,ubreddy/cubes,she11c0de/cubes