Workaround for issue #692.

Pull request for this workaround intended to fix the [issue #692] (https://github.com/angular-translate/angular-translate/issues/692). Tested under latest chrome (37.0.2062.102 m) + [https everywhere extension] (https://www.eff.org/https-everywhere) and latest firefox (31.0) and the same extension. The example code now works as expected under this browser/extension combination.

I actually do not know. Good for caching, but it's an additional dependency.