Ticket #17: Add EDM metadata format to OAI-PMH provider.
Ticket #17: Handle nil values in story conversion to EDM.
Ticket #56 - general tidy
Ticket #56 - general tidy
Ticket #56 - general tidy
added user phot to comment
Merge branch 'master' of https://github.com/europeana/Europeana1914-1918