* fix "existing_package_dict" which wasn't containing metadata_modified (because of the schema in the context) so you never skipped an object.
* fix IntegrityError due to resource revision_id being harvested. No idea why this hasn't caused errors before now.
* "unchanged" is now checked in base instead of ckanharvester - makes sense. Looking at other harvesters, it's normal to return from the import_stage with the value returned from base._create_or_update_package so I've continued with that.
* "unchanged" response is now documented
* better report_status tests in test_queue2.
* Fix extras as a list of dicts
* Fix SOLR dates syntax - needed a Z
* Basic tests for this updated ckan harvester
* Now require CKAN 2.0 to be able to be able to save these packages in package_show form. Take advantage of this now we are such various imports from are definitely available, such as munge_tag.
* Add back compatibility for other harvesters supplying restful-like package_dicts to _create_or_update_package
TODO add back in the ability to harvest pre 2.0 CKANs with the RESTful calls (fallback or maybe configurable)