+ migrating to latest version of bootstrap
+ making add_edit_view use the show_add_edit_form view to shoe the form
+ deleted useless files
+ renamed some files
+ normalising json before filling form
+ denormalising json after fetching from form
+ use the form field validation object defined in config object
+ restructured the form view - now it provides the form template and the submit buttons, the field set is defined in the template specified in config object. The field set is put inside the form template. So the user will only provide the fieldset.