Implement basic event management

[Marcus Fihlon]

An event should have the following properties:

• id (unique)
• version
• title
• subtitle
• speaker(s)
• date and time
• location
• description
• tags
• status (draft, published)

The RESTful JSON API:

• POST /api/events: Create a new event (secured, admin only)
• GET /api/events: Get a list of all events
• GET /api/events/{id}: Get the event with the specified id
• PUT /api/events/{id}: Update the event with the specified id (secured, admin only)

Depends on #3 and #4!

[Marcus Fihlon]

Reopened because the POST and PUT requests are not secured!

[Marcus Fihlon]

Blocked: #2 and #4 must be implemented first!