Refactoring
Add none scope to get empty relation
Add event category selections
Add categorized_as for multi categorization
Now event categorization available
Use event categories to event categorize
Now specified category includes descendants
Remove unused method
Move extra_value methods to super
Move gp_calendar_content_event_id to inner calendar_relation
Remove gp_calendar_content_event_id settings
Change comment
Move map_content_marker_id to inner map_relation
Apply default lat_lng
Move constants for setting to content
Now markers ordered by setting
Change default state to hidden
Change way to hide tab
Fix content was nil
Merge branch 'master' of github.com:zomeki/zomeki-development