Let RESTfull only work conform the web pages (to Christophes wish),
so add/edit event apart from add/edit attribute.
(there is annotation in the code to revert back to full RESTfull and
add/edit the attribute(s) alongside add/edit the event.)
Made tools/curl/input/event.xml more anonymous.
Events/xml/view.ctp wrongly showed category_order.
REST Event add did not work anymore given GFI sandbox import.