Consistent ordering and formatting for talk events

Use a consistent format for talk events, with the most recent talk at
the top of the list with the rest in a descending order.

This removes the need to use a `reverse` filter in the events partial.

source/_talks/deploying-drupal-fabric.md

@@ -6,23 +6,22 @@ meta:
     title: Deploying Drupal with Fabric
     description: "You've built your Drupal site, now learn how to deploy it with Fabric."
     type: website
-
 speakerdeck:
   id: 40d1eca4bd484afc86295924fff5dd41
   ratio: "1.77777777777778"
   url: "https://speakerdeck.com/opdavies/deploying-drupal-and-anything-else-with-fabric"
   embed: '<script async class="speakerdeck-embed" data-id="" data-ratio="" src="//speakerdeck.com/assets/embed.js"></script>'
-
 events:
-  - name: DrupalCamp Dublin 2017
+  -
+    name: Drupal Somerset
+    location: Glastonbury, UK
+    date: 2017-10-26
+  -
+    name: DrupalCamp Dublin 2017
     location: Dublin, Ireland
     url: http://2017.drupal.ie
     date: 2017-10-20
     time: "15:00 - 15:40"
-
-  - name: Drupal Somerset
-    location: Glastonbury, UK
-    date: 2017-10-26
 ---
 
 You’ve built your website, and now you just need to deploy it. There are various ways that this could be done - from (S)FTP, to SCP and rsync, to running commands like “git pull” and “composer install” directly on the server (not recommended).