Implemented total virtual memory function for OS X
Implemented total virtual memory function for OS X

qbit/psutil,qbit/psutil,mrjefftang/psutil,mrjefftang/psutil,mindw/psutil,giampaolo/psutil,tomprince/psutil,jorik041/psutil,qbit/psutil,landryb/psutil,packages/psutil,mindw/psutil,0-wiz-0/psutil,jorik041/psutil,giampaolo/psutil,mindw/psutil,jorik041/psutil,Q-Leap-Networks/psutil,mindw/psutil,jamesblunt/psutil,mrjefftang/psutil,msarahan/psutil,landryb/psutil,cloudbase/psutil,cloudbase/psutil,tomprince/psutil,landryb/psutil,landryb/psutil,Q-Leap-Networks/psutil,0-wiz-0/psutil,tomprince/psutil,msarahan/psutil,tomprince/psutil,landryb/psutil,jamesblunt/psutil,cloudbase/psutil,packages/psutil,jamesblunt/psutil,mindw/psutil,msarahan/psutil,packages/psutil,tomprince/psutil