title: getInitialProps is not called when visiting directly the page url in nextjs
body: <p>I have a nextjs app connected with redux (using withRedux) and my navigation is driven by a header, in which i use links for links to different parts of the page. </p>
  
  <p>I'm implemented _app.js to set up the container, provider, withRedux and in the getInitialProps in _app.js i fetch a list of users by dispatching an action, and make the results available on the store.</p>
  
  <p>it all works fine when i visit the home page, then i click on the link to the UserList. the dispatch call to load the users is done on getInitialProps in _app.js.</p>
  
  <p>If i visit the route directly in the browser (localhost:3000/UserList) getInitialProps is not called and the UserList page is empty.</p>
  
  <p>I don't know where to go from here, i've spent a day and a half.  </p>