后台概览增加缓存，增加上周统计数据，百分号

app/views/admins/dashboards/_baidu_tongji.html.erb

@@ -21,10 +21,10 @@
       <td><%= @pre_week_statistic.map(&:pv).sum %></td>
       <td><%= @pre_week_statistic.map(&:visitor).sum %></td>
       <td><%= @pre_week_statistic.map(&:ip).sum %></td>
-      <td><%= (@pre_week_statistic.map(&:source_through).sum.to_f / 7).round(2) %></td>
-      <td><%= (@pre_week_statistic.map(&:source_link).sum.to_f / 7).round(2) %></td>
-      <td><%= (@pre_week_statistic.map(&:source_search).sum.to_f / 7).round(2) %></td>
-      <td><%= ((@pre_week_statistic.map(&:source_custom) - [nil]).sum.to_f / 7).round(2)  %></td>
+      <td><%= (@pre_week_statistic.map(&:source_through).sum.to_f / 7).round(2) %>%</td>
+      <td><%= (@pre_week_statistic.map(&:source_link).sum.to_f / 7).round(2) %>%</td>
+      <td><%= (@pre_week_statistic.map(&:source_search).sum.to_f / 7).round(2) %>%</td>
+      <td><%= ((@pre_week_statistic.map(&:source_custom) - [nil]).sum.to_f / 7).round(2)  %>%</td>
       </td>
     </tr>
   <% end %>