Show bandwidth graph on node page

assets/style.css

@@ -212,6 +212,16 @@ dd.flag i {
   opacity: 0.3;
 }
 
+.bandwidth small {
+  color: rgba(255, 255, 255, 0.75);
+}
+
+pre {
+  background: rgba(255, 255, 255, 0.1);
+  margin: 0;
+  overflow: hidden;
+}
+
 .columns {
   -moz-columns: 2;
        columns: 2;

views/node.html

@@ -52,6 +52,13 @@
       </section>
     {% endif %}
 
+    {% if bandwidth %}
+      <section class="bandwidth">
+        <h3>Bandwidth <small>(MB/s over the last month)</small></h3>
+        <pre>{{ bandwidth }}</pre>
+      </section>
+    {% endif %}
+
     <div class="columns">
 
       {% if