fix (player): default keyboard events are not prevented

Before the keyboard event listener was all too greedy and prevented any
default keyboard event from being passed to the browser.
Reloading the page, for example, is now possible even if the player has
focus.

src/js/app.js

@@ -297,9 +297,8 @@ function addBehavior(player, params, wrapper) {
        startedPaused = media.paused;
        }
        */
-      e.preventDefault();
-      e.stopPropagation();
-
+      //  e.preventDefault();
+      //  e.stopPropagation();
       var keyCode = e.which,
         duration = timeline.player.duration,
         seekTime = timeline.player.currentTime;
@@ -340,7 +339,7 @@ function addBehavior(player, params, wrapper) {
             timeline.player.pause();
           return false;
         default:
-          return false;
+          return true;
       }
 
       timeline.setTime(seekTime);