Merge #724: add ical format of the meeting camendar

573b1af generalizing to calendar app. (Stephan Oeste)
44b1115 add ical format of the meeting camendar (Stephan Oeste)

Pull request description:

  add ical format of the meeting camendar

ACKs for top commit:
  harding:
    Tested ACK 573b1af .  Built site preview and tested link with my calendar app.

Tree-SHA512: faf638d8929cf735d64ee20eedf3dbd483e0ce1a0f4332fc27b1f2f9dcfa0c2ded7e416f07050c2fad0d02011034788586b05d98ddee97fa59461afde7db49ef

Author: harding

_posts/en/pages/2016-01-01-meetings.md

@@ -20,6 +20,8 @@ Current meeting schedule:
 Meeting times are also listed on [this Google calendar][meeting
 calendar].
 
+[Here as ical format][meeting calendar ical] to subscribe via a calendar app.
+
 If you have any questions about the date or time of an upcoming meeting,
 please ask in `#bitcoin-core-dev` on Freenode.
 
@@ -33,5 +35,6 @@ separate page][summaries].
 
 [meetbot]: http://www.erisian.com.au/meetbot/bitcoin-core-dev/
 [meeting calendar]: https://calendar.google.com/calendar?cid=MTFwcXZkZ3BkOTlubGliZjliYTg2MXZ1OHNAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ
+[meeting calendar ical]: https://calendar.google.com/calendar/ical/11pqvdgpd99nlibf9ba861vu8s%40group.calendar.google.com/public/basic.ics
 [review club]: https://bitcoincore.reviews/
 [summaries]: /en/meeting-summaries/