overview: Cosmetic changes.

* Don't pass unresponsive to the view, access config[] object instead
* Remove the statistics header, it only takes up space
* Lowercase a few things
* Change the descriptions for 'radiator' to make the math work: Because
  of how PuppetDB's aggregate-events-count works nodes with both
  successful and failed events count for both causing success + failure
  + unreported to not equal population, which is weird. Now we're simply
  stating that they have failed events instead of saying that the node
  is succesful/failed.

puppetboard/app.py

@@ -102,7 +102,7 @@ def index():
             node.noresponse = str(delta.days) + "d " + str(int(delta.seconds/3600)) +"h " + str(int((delta.seconds%3600)/60))+ "m"
             unreported.append(node)
 
-    return render_template('index.html', metrics=metrics, latest_event_count=latest_event_count, latest_events=latest_events, unreported=unreported, unreported_time=app.config['UNRESPONSIVE_HOURS'])
+    return render_template('index.html', metrics=metrics, latest_event_count=latest_event_count, latest_events=latest_events, unreported=unreported)
 
 @app.route('/nodes')
 def nodes():