Setup Search without TLS

* Adds a elasticsearch role
* Configures Warehouse to use that role to find search nodes
* Adds Nginx to proxy port 8200 to the elasticsearch port 9200
Use the firewall to block access to elasticsearch except by IP address
Simplify firewall by using a Rackspace Network for internal coms
Use the proper config file format
Really use the right format
Merge pull request #73 from dstufft/elasticsearch

[WIP] Elasticsearch