Add missing XML atom references
Use getter method for event urls
Order and filter events
Initial iCalendar implementation
Add calendar prodid
Use ri_cal instead of icalendar gem
Generate icalendar with a template
Add subscribe to event links
Set webcal protocol for events icalendar
Use feedpress URL for RSS feed
Substitute failing event controller test
Use event created date time for RSS pubDate
Merge branch 'dev'