Updated date and generated new html
Fixed documentation about datasets
Fixed documentation for publications
added sortby parameter
Updated pubdate
Overview cleanup
added links to the latest available schema and documentation
#690: HTTP API documentation for project and other updates.
#550: making it clear we are delivering metadata only. Clenaup.
updated date
re-added OAI set for projects
Main docbook file renamed from book.xml to api-doc.xml
updated OAI-PMH sets: now delivering only results and no other entities.