updated docs for CentOS, RedHat installation
updated docs for CentOS, RedHat installation

b-cube/OWSLib,JuergenWeichand/OWSLib,Jenselme/OWSLib,kwilcox/OWSLib,jaygoldfinch/OWSLib,menegon/OWSLib,gfusca/OWSLib,geopython/OWSLib,KeyproOy/OWSLib,kalxas/OWSLib,datagovuk/OWSLib,robmcmullen/OWSLib,daf/OWSLib,ocefpaf/OWSLib,geographika/OWSLib,datagovuk/OWSLib,datagovuk/OWSLib,bird-house/OWSLib,daf/OWSLib,jaygoldfinch/OWSLib,mbertrand/OWSLib,daf/OWSLib,jachym/OWSLib,dblodgett-usgs/OWSLib,QuLogic/OWSLib,tomkralidis/OWSLib