minor fixups to the README file
minor fixups to the README file

patch by dlester reviewed by dbrosius for CASSANDRA-12553

clohfink/cassandra,mkjellman/cassandra,beobal/cassandra,thelastpickle/cassandra,jasonstack/cassandra,mkjellman/cassandra,yukim/cassandra,ifesdjeen/cassandra,juiceblender/cassandra,szhou1234/cassandra,yhnishi/cassandra,modempachev4/kassandra,stef1927/cassandra,sharvanath/cassandra,tommystendahl/cassandra,iamaleksey/cassandra,cooldoger/cassandra,ollie314/cassandra,thelastpickle/cassandra,aboudreault/cassandra,scaledata/cassandra,yukim/cassandra,carlyeks/cassandra,jeromatron/cassandra,kgreav/cassandra,thobbs/cassandra,juiceblender/cassandra,driftx/cassandra,belliottsmith/cassandra,krummas/cassandra,yhnishi/cassandra,ifesdjeen/cassandra,modempachev4/kassandra,scylladb/scylla-tools-java,spodkowinski/cassandra,juiceblender/cassandra,cooldoger/cassandra,mambocab/cassandra,modempachev4/kassandra,clohfink/cassandra,iamaleksey/cassandra,hhorii/cassandra,bcoverston/cassandra,jrwest/cassandra,cooldoger/cassandra,pauloricardomg/cassandra,beobal/cassandra,aweisberg/cassandra,jeromatron/cassandra,mkjellman/cassandra,michaelsembwever/cassandra,tommystendahl/cassandra,DikangGu/cassandra,strapdata/cassandra,mshuler/cassandra,mshuler/cassandra,blambov/cassandra,tommystendahl/cassandra,ptnapoleon/cassandra,snazy/cassandra,jeromatron/cassandra,driftx/cassandra,jasonstack/cassandra,chbatey/cassandra-1,WorksApplications/cassandra,cooldoger/cassandra,yhnishi/cassandra,thobbs/cassandra,jasobrown/cassandra,blerer/cassandra,Jaumo/cassandra,krummas/cassandra,Instagram/cassandra,jasonstack/cassandra,aweisberg/cassandra,mshuler/cassandra,Jaumo/cassandra,chbatey/cassandra-1,michaelsembwever/cassandra,driftx/cassandra,jrwest/cassandra,strapdata/cassandra,szhou1234/cassandra,tjake/cassandra,exoscale/cassandra,aweisberg/cassandra,bdeggleston/cassandra,pauloricardomg/cassandra,clohfink/cassandra,ptnapoleon/cassandra,scylladb/scylla-tools-java,mshuler/cassandra,ifesdjeen/cassandra,belliottsmith/cassandra,bdeggleston/cassandra,thobbs/cassandra,adelapena/cassandra,bcoverston/cassandra,thelastpickle/cassandra,jasobrown/cassandra,aureagle/cassandra,chbatey/cassandra-1,yukim/cassandra,mike-tr-adamson/cassandra,scaledata/cassandra,pauloricardomg/cassandra,bmel/cassandra,stef1927/cassandra,bcoverston/cassandra,josh-mckenzie/cassandra,blambov/cassandra,ptnapoleon/cassandra,yukim/cassandra,apache/cassandra,tommystendahl/cassandra,christian-esken/cassandra,krummas/cassandra,vaibhi9/cassandra,Jollyplum/cassandra,scylladb/scylla-tools-java,josh-mckenzie/cassandra,jbellis/cassandra,tjake/cassandra,jasobrown/cassandra,instaclustr/cassandra,jbellis/cassandra,sharvanath/cassandra,michaelsembwever/cassandra,exoscale/cassandra,jeffjirsa/cassandra,DikangGu/cassandra,kgreav/cassandra,michaelsembwever/cassandra,iamaleksey/cassandra,mike-tr-adamson/cassandra,joesiewert/cassandra,apache/cassandra,sharvanath/cassandra,adejanovski/cassandra,aureagle/cassandra,carlyeks/cassandra,juiceblender/cassandra,tjake/cassandra,snazy/cassandra,sedulam/CASSANDRA-12201,jrwest/cassandra,mambocab/cassandra,scylladb/scylla-tools-java,DikangGu/cassandra,blerer/cassandra,jbellis/cassandra,apache/cassandra,hhorii/cassandra,jasobrown/cassandra,instaclustr/cassandra,aboudreault/cassandra,szhou1234/cassandra,kgreav/cassandra,bmel/cassandra,josh-mckenzie/cassandra,bmel/cassandra,mike-tr-adamson/cassandra,jasonwee/cassandra,Jaumo/cassandra,bdeggleston/cassandra,belliottsmith/cassandra,blambov/cassandra,mambocab/cassandra,jeffjirsa/cassandra,spodkowinski/cassandra,jrwest/cassandra,snazy/cassandra,sedulam/CASSANDRA-12201,beobal/cassandra,snazy/cassandra,exoscale/cassandra,Instagram/cassandra,aweisberg/cassandra,blerer/cassandra,instaclustr/cassandra,spodkowinski/cassandra,sedulam/CASSANDRA-12201,adelapena/cassandra,jasonwee/cassandra,bdeggleston/cassandra,strapdata/cassandra,iamaleksey/cassandra,christian-esken/cassandra,Instagram/cassandra,carlyeks/cassandra,instaclustr/cassandra,WorksApplications/cassandra,Jollyplum/cassandra,adelapena/cassandra,WorksApplications/cassandra,beobal/cassandra,kgreav/cassandra,driftx/cassandra,thelastpickle/cassandra,adejanovski/cassandra,Jollyplum/cassandra,jeffjirsa/cassandra,stef1927/cassandra,christian-esken/cassandra,aboudreault/cassandra,joesiewert/cassandra,Instagram/cassandra,jasonwee/cassandra,clohfink/cassandra,hengxin/cassandra,adelapena/cassandra,mike-tr-adamson/cassandra,krummas/cassandra,blambov/cassandra,hengxin/cassandra,aureagle/cassandra,hhorii/cassandra,apache/cassandra,josh-mckenzie/cassandra,stef1927/cassandra,WorksApplications/cassandra,blerer/cassandra,spodkowinski/cassandra,ifesdjeen/cassandra,vaibhi9/cassandra,scaledata/cassandra,bcoverston/cassandra,mkjellman/cassandra,ollie314/cassandra,ollie314/cassandra,adejanovski/cassandra,jeffjirsa/cassandra,strapdata/cassandra,joesiewert/cassandra,tjake/cassandra,hengxin/cassandra,belliottsmith/cassandra,pauloricardomg/cassandra,vaibhi9/cassandra,szhou1234/cassandra