README for consul::service is out of date

[zxjinn]

In the README the Service Definition section code example looks like it's showing an older way of configuration. The redis example should look like so:

  ::consul::service { 'redis':
    checks  => [
      { 
        script   => "/usr/local/bin/check_redis.py",
        interval => "10s"
      }
    ],
    port    => 8000,
    tags    => ['master']
  }

Just like my other issue I just made, I'm more than willing to submit a PR if you don't want to do the legwork.

[solarkennedy]

Yes please, I would love a PR on a README refresh.
If you are in there, feel free to address #97 ?