Add "My Stories" link to builder tools menu

Closes #784
Make builder alerts fade out faster

By default, make builder alerts fade out in 8 seconds instead of
15.  This can be overridden by passing the ``timeout`` option
when triggering the ``alert`` event on the global event bus.

Closes #870
Merge branch 'master' into develop

Need to remove "{% load url from future %}" as this is no longer
needed in Django 1.5