Handle `event` frontmatter

[ear1grey]

Historical articles have event front-matter thus:

event:
    date:  2015-08-30 10:00
    end: 2015-08-30 14:00
    location: A nice pub, Somewhere, Portsmouth
    contact: Billy Biker
    email: billy@pompey.bike

It would be really useful to present this in a standardised format (via a template) and also to process the collection of events and make them available in iCal format.

[ear1grey]

Also let's not publish email addresses for historical events as these could lead to spamming.

[Pseudorizer]

By publish do you mean including them in the frontmatter at all?