Protractor never synchronizes on pages using am-time-ago directive

[urish]

The am-time-ago directive uses the $timeout service to automatically update the text as time passes. This causes protractor tests to fail, as there is always a pending $timeout and thus it never manages to synchronize. For more information about protractor synchronization, see [https://github.com/angular/protractor/issues/49] .

In order to fix this issue, we simply need to replace the $timeout calls with vanilla $window.setTimeout().