New chef run list (in Railsification Controller) setups up a local postgres server and db

Some rails applications require a Postgres database. This run-list complements an already updated Railsification cookbook and installs and sets up a postgres database server and table:

```json
{
  "run_list": [
    "rackbox"
  ],
  "rackbox": {
    "ruby": {
      "versions": [
        "2.0.0-p195",
        "1.9.3-p448"
      ],
      "global_version": "2.0.0-p195"
    },
    "apps": {
      "unicorn": [
        {
          "appname": "app1",
          "hostname": "app1"
        }
      ]
    },
    "db_root_password": "iloverandompasswordsbutthiswilldo",
    "databases": {
      "postgresql": [
        {
          "password": "app1_pass",
          "database_name": "app1_production",
          "username": "app1"
        }
      ]
    }
  }
}
```