title: Unable to set routes on elixir phoenix umbrella project
body: <p>I'm creating an umbrella project using Phoenix 1.3. Structure is something like this:</p>
  
  <ul>
  <li>MainDirUmbrella
  
  <ul>
  <li>apps
  
  <ul>
  <li>my_app</li>
  </ul></li>
  </ul></li>
  </ul>
  
  <p>Expecting to target the path <em>localhost:4000/rates/:coin</em>, I set the following route in router.ex:</p>
  
  <pre><code>scope "/rates", MyAppWeb do
    get "/:coin", RatesController, :show
  end
  </code></pre>
  
  <p>For which <code>mix phx.routes</code> returns:</p>
  
  <pre><code>rates_path  GET  /rates/:coin  MyAppWeb.RatesController :show
  </code></pre>
  
  <p>But when I try to access a route like <em>localhost:4000/rates/usd</em> I get a Phoenix.Router.NoRouteError: "not route found.."</p>