Issue #232 - corrected get_physmem() function to use sysinfo's mem_size multiple to correctly calculate memory values returned from sysinfo call.
Issue #232 - corrected get_physmem() function to use sysinfo's mem_size
multiple to correctly calculate memory values returned from sysinfo call.

ztop/psutil,ztop/psutil,ztop/psutil,ztop/psutil