title: How do i write a cleaner date picker input for SimpleForm
body: <p>I love the <code>simple_form</code> gem for rails but i dont like this line of code:</p>
  
  <pre><code>&lt;%= f.input :deadline, :as =&gt; :string, :input_html =&gt; { :class =&gt; 'date_picker' } %&gt;
  </code></pre>
  
  <p>I would like to write:</p>
  
  <pre><code>&lt;%= f.input :deadline, :as =&gt; :date_picker %&gt;
  </code></pre>
  
  <p>or even over write the <code>:date</code> / <code>:datetime</code> matchers completely.</p>
  
  <p>But i dont really want to write a whole <code>custom_simple_form</code></p>
  
  <p>I think it must be possible...</p>
  
  <p>Please help thanks</p>