Add fluent-plugin-rethink, Fluentd to RethinkDB

Similar to https://github.com/fluent/fluent-plugin-mongo/. This ships FluentD events to RethinkDB
Remove extra lines
Merge branch 'patch-1' of git://github.com/kureikain/docs into kureikain-patch-1
Add a .
Merge branch 'kureikain-patch-1'