Remove unneeded permissions logic code from the department model.
Adds the 'department_parent' method to personal_folder as a stub that returns nil.  This shouldn't be needed once the breadcrumb is fixed up.
Adds personal folders as a resource.
Adds PersonalFolder to the list of editable objects covered by the editable objects helper.
Initial buildout of shared partials/personal folder controllers and views
Fix up the department factory to not use removed permissions= method.