Instructions are unclear/could be improved

[Bob-The-Marauder]

From basho/riak#1142 it looks like https://www.tiot.jp/riak-docs/riak/kv/3.2.0/using/running-a-cluster/#running-multiple-nodes-on-one-host may need some re-work. Explaining that different nodes need to be on different ports to avoid port collisions would be a good start and maybe looking in to the handoff port thing as well.

We could also offer a shellscript that just goes through x rel-nodes and fixes the ports. Would probably be a for loop with about 10 sed statements.