Example HOCON settings are missing the plugin key

[Jay DeBoer]

Being a noob I ran into issues while trying to get started with Akka.Persistence using Redis. It turns out I had to add plugin = "akka.persistence.journal.redis" to the journal settings and plugin = "akka.persistence.snapshot-store.redis" to the snapshot-store settings.

[Sean Gilliam]

Closed via #14