Newrelic

Started on adding support for redis in newrelic recipe (already supported in meetme plugin), but found some other things that could be improved. Changes:
- Adding new code block for meetme redis config, tied to the included redisio::enable recipe
- Changed meetme config for the rabbitmq block from symbol to string syntax
- Changed node['recipes'] to node.recipe?
- Added an if statement around the uwsgi meetme block unless stackname is pythonstack
- Had some issues with the use of stackname is various places (which is a side-effect of the current de-dupe effort) so had to clean up some of the references to have a successful converge

Since we don't really test newrelic, I used the following in .kitchen.local.yml:

---
provisioner:
  attributes:
    newrelic:
      license: "my_personal_account_licence"
    stack_commons:
      stackname: 'pythonstack'
    pythonstack:
      demo:
        enabled: false
      webserver: 'nginx'
      nginx:
        sites:
          kitchensite:
            uwsgi_port: 666
suites:
  - name: sia
    run_list:
      - recipe[stack_commons::memcached]
      - recipe[stack_commons::rabbitmq]
      - recipe[nginx]
      - recipe[stack_commons::redis_single]
      - recipe[stack_commons::newrelic]

> Hey guys. I will respond to these things tomorrow as it's quite late now. However, the meetme cookbook we use specifies the config stanzas with hash rockets. Will clarify tomorrow.

And the newrelic recipe was full of this already.