Removes deprecated helper methods.

These methods has been deprecated in earlier versions, so they are removed now.
Adds specs for admin pictures helper.
Adds specs for admin pages_helper#combined_page_status method.
Merge pull request #412 from robinboening/deprecated_method_remove

Removes deprecated helper methods.
Merge pull request #413 from robinboening/admin_pictures_helper_specs

Adds specs for admin pictures helper.
Merge pull request #414 from robinboening/combined_page_status_specs

Adds specs for admin pages_helper#combined_page_status method.