melparse: fix handling of array initialization, add matrix handling
melparse: fix handling of array initialization, add matrix handling

assumptionsoup/pymel,juggernate/pymel,AtonLerin/pymel,david-lassonde-adsk/pymel,assumptionsoup/pymel,shrtcww/pymel,juggernate/pymel,shrtcww/pymel,AtonLerin/pymel,leonsooi/pymel,david-lassonde-adsk/pymel,leonsooi/pymel