Ckanext-dcat

* Support for embedding Schema.org structured data in dataset pages (75)
* Improve the error handling in the harvesting gather and import stage (95)
* Avoid resource re-creation on harvesting (91)
* Infer dataset licence from the distribution ones (42)
* Interface for requests Session in harvesters (98)
* Support for transitive harvesting (96)
* Support fot cleaning tags in harvester (103)

* Use Resources rather than Literals for dcat:landingPage, dcat:accessURL,
dcat:downloadURL, foaf:homepage, dcat:theme (66)
* Support for pagination on RDF Harvester (70)
* Add missing DCAT fields on the serialization, dct:type and dct:provenance (71)
* Add MANIFEST.in to ensure i18n files are include in package (76)
* Add before/after create/update hooks to IDCATRDFHarvester (77)
* Fix serialization of numeric values (73)