added "merge model" command to create a master model
added "merge model" command to create a master model

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