Migrate Events

[pferreir]

• [x] event_data
• [x] event_alarms
• [x] event_logs
• [x] event_notes
• [x] event_images
• [x] event_stubs
• [x] event_menus
• [x] event_layout
• [x] event_surveys
• [x] event_managers
• [x] event_regforms
• [x] event_participants
• [x] event_timetable
• [x] event_locations
• [x] event_categories
• [x] event_dates_titles
• [x] event_abstracts_zodb / event_abstracts
• [x] event_paper_reviewing_legacy / event_papers
• [x] event_acls
• [x] event_types
• [x] event_keywords_ctimes_visibility
• [x] event_shorturls