rebase of pull 44

thought i would rebase pull https://github.com/xaque208/puppet-unbound/pull/44. i had to remove to following
  * max_udp_size - not available in the version installed on ubuntu 12.04
  * rrset_roundrobin - not available in the version installed on ubuntu 12.04
  * local_d - couldn't get it to work if there are no includes, even tried an empty file but no success 

 I also reverted the white space changes as 2 whitespace is much more inline wit puppet style and it seems to be more inline with your style (and mine for that matter). have only tested on a basic install of ubuntu 12.04.  
I agree with the firewall stuff i dont use that either so removed.  As to moving things to params that is more of a convention with puppet modules, one expects module defaults to exist in params.pp. however i wasn't clear what you where asking so i may have misunderstood the question.