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 see many of these parameters change, or get moved to references to the params class, but I don't see corresponding changes in the params class.  Is the idea to assume defaults?