Enhancement - stats report

- Reimplemented the stats report so that it uses the Table object,
  and therefore has the same aesthetics as the other reports.

html/task.html

@@ -162,6 +162,8 @@
                   <li>For custom reports that define a "limit" to the number of rows of output
                       such as "oldest" and "newest", task allows an override value.  For
                       example "task oldest 5" will display the 5 oldest tasks.
+                  <li>Modified the "stats" report so that it has the same aesthetics as the
+                      other reports.
                 </ul>
 
                 <p>