title: react-bootstrap - custom container class for navbar?
body: <p>I'm developing a project using <code>react-bootstrap</code> and I notice that the <code>Navbar</code> component insert the contents of the navbar into a <code>container</code> div and I was wondering if there is any way to override this and give a custom class?</p>
  
  <p>I see that you can add a custom element with the attribute <code>componentClass</code> but if I add this then I lose all the <code>nav</code> styling. <code>componentClass="nav custom-class"</code> throws an error.</p>