coal/paper: Add link to raw changeset as other styles have it, too

coal/paper: Add link to raw changeset as other styles have it, too

--- a/templates/coal/changeset.tmpl	Sat Aug 30 17:13:23 2008 +0200
+++ b/templates/coal/changeset.tmpl	Fri Aug 29 15:16:50 2008 +0200
@@ -15,6 +15,7 @@
 </ul>
 <ul>
  <li class="active">changeset</li>
+ <li><a href="{url}raw-rev/{node|short}{sessionvars%urlparameter}">raw</a></li>
  <li><a href="{url}file/{node|short}{sessionvars%urlparameter}">browse</a></li>
 </ul>
 <ul>