Added time to the popstate event timeout

Apparently, node 0.8 mixes up thread execution order and sometimes the 0ms timeout isn't enough to catch the popstate event.  This caused ```npm test``` to fail.  Interestingly, it did not cause ```test/runner -s window/history.js``` to fail.  Its always scary when issues are not stateless...

test/window/history.js

@@ -130,5 +130,5 @@ exports["the history object should fire popstate on the window while navigating
     t.ok(eventFired, "popstate event should be fired.");
     t.strictEqual(state, eventState);
     t.done();
-  }, 0);
+  }, 10);
 };