Merge pull request #536 from prometheus/link-promcon-videos

Replace 1.0 news with PromCon video news on landing page.

content/index.html

@@ -13,7 +13,7 @@ layout: jumbotron
 </div>
 
 <div class="newsbar">
-  Prometheus 1.0 is out!&nbsp;&nbsp;—&nbsp;&nbsp;<a href="/blog/2016/07/18/prometheus-1-0-released/">Learn more</a>
+  PromCon 2016 videos are out!&nbsp;&nbsp;—&nbsp;&nbsp;<a href="https://www.youtube.com/watch?v=-JkxB0CiMjU&list=PLoz-W_CUquUlCq-Q0hy53TolAhaED9vmU">Watch them here</a>
 </div>
 
 <div class="container">