UX improvements to dataset edit as of Dec 2011

[rgrp]

Super ticket: #1506

• Show edit summary form again, at least on edit pages (and prefill it for create to something sensible like: Creating dataset {title} {name}) [Done #1506]
• Fix drop down for resource types in resource add/edit to limit to fixed set of options (as per ​http://wiki.ckan.org/Domain_Model/Resource)
  • See also ​http://lists.okfn.org/pipermail/ckan-discuss/2011-December/001860.html
• Allow reordering of resources (or: and this is somewhat more complex but possibly simpler: allow editing of a resource_order field and we use that to sort resources (this is more like wordpress page_order -- these two options could become the same if we just hijack the existing position field on the join table and get rid of ordereredlist extension)) [DONE #1506]
• Radically simplify set of licenses [DONE #1359]
• "Unsaved changes" warning briefly when you click "Save" #1735
• "Unsaved changed" typo on dataset edit page

[zephod]

Massive refactor of parent ticket mean this is all done and can be closed off. See #1506 for remaining UX work.