update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/CoreHome/templates/getMultiRowEvolutionPopover.twig

@@ -8,7 +8,7 @@
         <h2>{{ availableRecordsText|translate }}</h2>
         <table class="metrics" border="0" cellpadding="0" cellspacing="0">
             {% for i, metric in metrics %}
-                <tr>
+                <tr {% if metric.hide|default %}style="display:none"{% endif %}>
                     <td class="sparkline">
                         {{ metric.sparkline|raw }}
                     </td>
@@ -23,7 +23,7 @@
                 </tr>
             {% endfor %}
         </table>
-        <a href="#" class="rowevolution-startmulti">&raquo; {{ 'RowEvolution_PickAnotherRow'|translate }}</a>
+        <a href="#" class="rowevolution-startmulti">» {{ 'RowEvolution_PickAnotherRow'|translate }}</a>
     </div>
     {% if availableMetrics|length > 1 %}
         <div class="metric-selectbox">