Adds spec for Alchemy::Tag model.
Adds specs for Cell model.
Refactors Element#descriptions spec.

* Instead of moving the yml file around, we can stub this shit!

* Removes never called code from the model.
(rescue will never be used because we already rescue the load_file with an empty Array)
Adds spec for Element.all_for_page
Adds specs for Element.elements_for_layout
Removes old and unused method Element.get_from_clipboard
Adds spec for Element#to_partial_path
Adds more specs for Attachment#icon_css_class
Removes unused method #save_link for EssencePicturesController.
Fixes typo in notice (no image found).
Adds specs for EssencePicturesController
Removes unused code from the seeder.