Add 1.0 announcement news bar.

Revert this after we feel that the news is not hot anymore.

content/css/docs.css

@@ -52,7 +52,7 @@ body {
   text-align: center;
   font-family: Lato, sans-serif;
   text-shadow: rgba(0, 0, 0, 0.2) 0px 2px 0px;
-  margin-bottom: 50px;
+  margin-bottom: 0px;
   padding: 40px 0;
 }
 
@@ -84,6 +84,16 @@ body {
   color: #fff;
 }
 
+.newsbar {
+  background-color: #eee;
+  text-align: center;
+  font-family: Lato, sans-serif;
+  padding: 25px 0;
+  font-size: 24px;
+  font-weight: 300;
+  margin-bottom: 50px;
+}
+
 .feature-item {
   font-family: 'Lato', sans-serif;
   font-weight: 300;

content/index.html

@@ -12,6 +12,10 @@ layout: jumbotron
   </div>
 </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>
+</div>
+
 <div class="container">
   <div class="row">
     <div class="col-md-3 col-sm-6 col-xs-12 feature-item">