Fix Tom Dale avatar

Author: stedman

_meetups/2013-10-15-meetup.md

@@ -7,7 +7,7 @@ video: https://vimeo.com/77760308
 speakers:
   - name: Tom Dale
     title:
-    avatar: https://scontent-dfw5-1.cdninstagram.com/v/t51.2885-19/s150x150/18251437_1886900778245523_5316080506310230016_a.jpg?_nc_ht=scontent-dfw5-1.cdninstagram.com&_nc_ohc=mCDzP-CfwtsAX-2zlvu&oh=98172871d2c40e6ec1cdbe3c927078c7&oe=5ECAD51B
+    avatar: https://2015.texasjavascript.com/pixels/speaker-tom.jpg
     bio:
     email:
     homepage: http://tomdale.net/