Stats processing: Add previousDownload field in addition to downloadInterval

sitescripts/stats/template/fileStats.html

 <!--
   - This file is part of the Adblock Plus web scripts,
   - Copyright (C) 2006-2013 Eyeo GmbH
   -
   - Adblock Plus is free software: you can redistribute it and/or modify
   - it under the terms of the GNU General Public License version 3 as
   - published by the Free Software Foundation.
   -
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   - but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 98 matching lines @@
         {%- set dummy = filterFields.append(field) %}
       {%- endif %}
     {%- endfor %}
 
     <div id="quickLinks">
       {%- if filterFields|length > 0 %}
         <a href="#overview">Overview</a>
       {%- endif %}
 
       {%- for field in fields %}
-        {%- if not field.filter and field.name in data %}
+        {%- if not field.filter and not field.hidden and field.name in data %}
           <a href="#{{field.name}}">{{field.title}}</a>
         {%- endif %}
       {%- endfor %}
     </div>
 
     {%- if filterFields|length > 0 %}
       {%- if filter %}
         {%- set params = {"totalhits": data.hits, "totalbandwidth": data.bandwidth, "field": {"name": None}} %}
       {%- else %}
         {%- set items = data.day|sortfield("day") %}
@@ skipping 10 matching lines @@
           {%- for field in filterFields %}
             {{row(field.title, data[field.name].true, params, chart=False,
                   filtered_url=filtered_urls.get(field.name, {}).get("true", None))}}
           {%- endfor %}
           {{row("Total", {"hits": params.totalhits, "bandwidth": params.totalbandwidth}, params, special=True, emph=True, chart=False)}}
         </table>
       </div>
     {%- endif %}
 
     {%- for field in fields %}
-      {%- if not field.filter and field.name in data %}
+      {%- if not field.filter and not field.hidden and field.name in data %}
         {%- set items = data[field.name]|sortfield(field) %}
         {%- set params = {"maxhits": items|maxhits, "maxbandwidth": items|maxbandwidth,
                           "totalhits": items|sumhits, "totalbandwidth": items|sumbandwidth,
                           "field": field} %}
         {%- set count = items|length %}
         <div id="{{field.name}}" class="block_title">{{field.title}}</div>
         <div class="block">
           <table align="center">
             <tr>
               <th bgcolor="#ECECEC">{{field.coltitle}}</th>
@@ skipping 32 matching lines @@
             {%- endif %}
             {%- if field.name == "day" and filterFields|length == 0 %}
               {{row("Total", {"hits": params.totalhits, "bandwidth": params.totalbandwidth}, params, special=True, emph=True, chart=False)}}
             {%- endif %}
           </table>
         </div>
       {%- endif %}
     {%- endfor %}
   </body>
 </html>