fix($viewContentLoading): Add $viewContentLoading event back
fix($viewContentLoading): Add $viewContentLoading event back

Closes https://github.com/ui-router/ui-router.github.io/issues/9

mattlewis92/ui-router,codersongs/codersongs.github.io,angular-ui/ui-router,mattlewis92/ui-router,fpipita/ui-router,codersongs/codersongs.github.io,fpipita/ui-router,angular-ui/ui-router,angular-ui/ui-router,fpipita/ui-router