Fix order-dependent failure of stream_view_spec.js

This spec was only passing when it was run after another spec (router_spec.js) that put `app.page` in an appropriate state.

spec/javascripts/app/views/stream_view_spec.js

@@ -1,5 +1,8 @@
 describe("app.views.Stream", function() {
   beforeEach(function() {
+    // This puts `app.page` into the proper state.
+    new app.Router().stream();
+
     loginAs({name: "alice", avatar : {small : "http://avatar.com/photo.jpg"}});
 
     this.posts = $.parseJSON(spec.readFixture("stream_json"));