Pointing directly to the URL for active or completed does shift or open the page in the equivalent tab

[niieani]

Going to: http://evancz.github.io/elm-todomvc/#/completed does not open TodoMVC in the proper tab.
Nor does going to http://evancz.github.io/elm-todomvc/ and subsequently entering http://evancz.github.io/elm-todomvc/#/completed change the tab.

[MichaelSnowden]

Check out pull/61