title: JSON Serialization in Web Api 2 not using ISO 8601 dates
body: <p>I'm using WebApi 2 to send some Json down to the client and its using the old style Date serialization and not ISO 8601.</p>
  
  <p>I'm seeing:</p>
  
  <pre><code>"current_period_start": "\/Date(1388153705)\/",
  "current_period_end": "\/Date(1390832105)\/",
  "start": "\/Date(1388332525)\/",
  </code></pre>
  
  <p>My Global.asax.cs looks like this:</p>
  
  <pre><code>        GlobalConfiguration.Configure(WebApiConfig.Register);
          var formatters = GlobalConfiguration.Configuration.Formatters;
          var jsonFormatter = formatters.JsonFormatter;
          var settings = jsonFormatter.SerializerSettings;
          settings.Converters.Add(new IsoDateTimeConverter());
          settings.Formatting = Formatting.Indented;
          settings.ContractResolver = new CamelCasePropertyNamesContractResolver();
  </code></pre>