title: Handlebars helper does not work correctly
body: <p>I have created an Handlebars helper like the following.</p>
  
  <pre><code>Handlebars.registerHelper("format_currency", function(value, currency){
  
      var symbol = "";
      if(currency === "EUR") symbol = "&amp;#8364;";
      else if ... // other code here
  
      return value + " " + symbol;
  });
  </code></pre>
  
  <p>that I use in the following manner</p>
  
  <pre><code>{{format_currency amount currency}}
  </code></pre>
  
  <p>When I run the application application, the value field has the correct value (say 1.5) while the currency in an object that hash an hash property inside. Why? Here I would expect the currency I passed in (say "EUR").</p>
  
  <p>Am I missing something? Thanks.</p>