installation documentation update. 
installation documentation update. 
bopo/tablib,godfreyy/tablib,whix/tablib,tommyanthony/tablib,screwt/tablib,mloesch/tablib,godfreyy/tablib,mloesch/tablib,steveb/tablib,alex/tablib,whix/tablib,klothe/tablib,zhengzhihust/tablib,leohmoraes/tablib,klothe/tablib,steveb/tablib,zhengzhihust/tablib,enzochiau/tablib,leohmoraes/tablib,bopo/tablib,enzochiau/tablib,durden/tablib,screwt/tablib,kennethreitz/tablib