CFK-78: Test on example 6.2 from cdbxml guide
CFK-78: Validate xs:time elements properly as a ISO 8601 formatted time, optionally including fractional seconds and/or timezone
CFK-78: title element in event detail is optional
CFK-78: Add unhandled event attributes
CFK-78: Test categories
CFK-78: Add/correct API docs
CFK-78: Test contact info
CFK-78: Test detail
CFK-78: Add title to price element
CFK-78: Some missing API doc
CFK-78: Test media
CFK-78: Test price
CFK-78: Test detail
CFK-78: Test headings
CFK-78: Test keywords
CFK-78: Test languages
CFK-78: Test location
CFK-78: Test organiser
CFK-78: Reformat XML file
CFK-78: test event by Jonas Verhaeghe