web: Made elapsed time calculation dynamic (javascript). This allow safe caching of the pages by the browser and still display the right amount of elapsed time upon page refresh. If javascript is disabled, absolute time is displayed, leaving it readable. All the templates have been updated.

<table class="slogEntry parity{parity}">
 <tr>
  <td class="age">{date|date}</td>
  <td class="author">{author|person}</td>
  <td class="node"><a href="{url}rev/{node|short}{sessionvars%urlparameter}">{desc|strip|firstline|escape|nonempty}</a></td>
 </tr>
</table>