Add fields to with_tag view
Add fields to artefact view
Use get_artefact method for latest and upcoming stuff
Remove additional start_date
Fix tests
Merge branch 'master' of github.com:theodi/content_api into feature-add-event-fields

Conflicts:
	views/with_tag.rabl
Merge pull request #39 from theodi/feature-add-event-fields

Add Event fields