title: Add a form helper method
body: <p>Ive made a nice editor in jQuery and i want to add it as a form helper method. </p>
  
  <p>how would i go about making a new form helper method?</p>
  
  <p>ideally id like to be able to call:</p>
  
  <pre><code>f.nice_editor :field
  </code></pre>