Fix line numbering and add final step to readme
Fix line numbering and add final step to readme

patch by Brandon Williams; reviewed by Brandon Williams, Ekaterina Dimitrova for CASSANDRA-17319

mike-tr-adamson/cassandra,tjake/cassandra,pauloricardomg/cassandra,apache/cassandra,instaclustr/cassandra,adelapena/cassandra,belliottsmith/cassandra,mike-tr-adamson/cassandra,apache/cassandra,jrwest/cassandra,apache/cassandra,mshuler/cassandra,adelapena/cassandra,instaclustr/cassandra,belliottsmith/cassandra,mike-tr-adamson/cassandra,belliottsmith/cassandra,thelastpickle/cassandra,tjake/cassandra,mshuler/cassandra,blambov/cassandra,belliottsmith/cassandra,mshuler/cassandra,pauloricardomg/cassandra,tjake/cassandra,instaclustr/cassandra,thelastpickle/cassandra,thelastpickle/cassandra,apache/cassandra,mshuler/cassandra,blambov/cassandra,blambov/cassandra,jrwest/cassandra,mike-tr-adamson/cassandra,adelapena/cassandra,pauloricardomg/cassandra,instaclustr/cassandra,tjake/cassandra,jrwest/cassandra,blambov/cassandra,adelapena/cassandra,jrwest/cassandra,pauloricardomg/cassandra,thelastpickle/cassandra