Full hiera

Hi,

I noticed that in your documentation you talk about hiera but I couldn't find a way to use your module by only using hiera configuration.  For the stanzas it was needed to call the defines which is not possible with hiera alone (correct me if I'm wrong).  

Therefore I added some code that takes a configuration hash identified by `beaver::stanzas` first I added the code to init.pp but due to dependencies between the beaver class, service etc this introduced a cyclic dependency.  That is why I added another class called stanza's with only one task (to load stanza's from hiera when supplied).

Kind regards,

Peter