Update README install instructions for Linux which now requires a C compiler
Update README install instructions for Linux which now requires a C compiler

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