[enh] number of search results

searx/templates/results.html

 {% extends "base.html" %}
 {% block content %}
+<div class="right">
+    <a href="/" title="searx" class="site_link">searx</a> | Number of results: {{ number_of_results }}
+</div>
 <div class="small">
     {% include 'search.html' %}
 </div>

searx/webapp.py

         if request.form.get('format') == 'json':
             # TODO HTTP headers
             return json.dumps({'query': query, 'results': results})
-        template = render('results.html', results=results, q=query.decode('utf-8'), selected_categories=selected_categories)
+        template = render('results.html'
+                         ,results=results
+                         ,q=query.decode('utf-8')
+                         ,selected_categories=selected_categories
+                         ,number_of_results=len(results)
+                         )
         resp = make_response(template)
         if remember_categs:
             resp.set_cookie('categories', ','.join(selected_categories))