UPGRADE TO MOUNTAIN LION, Muparser2_2_3, qmake 4.8.4, openmpi

resolved minor diffs in almost all the tests due to an upgrade from
lion to mountain lion, muparser2_2_2 to muparser2_2_3, qmake from
4.8.0 to 4.8.4 and switching from mpich2 to openmpi.