Set default hierarchy in init;  added collect_dependencies() as stand-alone function; renamed distill_attributes to collect_attributes()
Set default hierarchy in init;  added collect_dependencies() as stand-alone function; renamed distill_attributes to collect_attributes()

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