Minor fix
Merge branch 'develop'
Replace title to Congreg
Add event model
Add sample events for testing
Show event list
Add user name on sample data
Add users to sample data
Show owner name in event
Add link to all events at header
Show event
Refactor code with helper to show timeslot
Replace user in event to owner
Show edit and delete buttons if owner is current user
Add action to create event at header
Support creating event
Support editting event
Support deleting event
Support showing markdown at description
Support web API for markdown