Admin part: can import, export and drop themes

onyx/tpl/bootstrap/admin/themes.tpl

@@ -0,0 +1,44 @@
+{extends file="admin/layout.tpl"}
+
+{block name=content}
+<table class="table">
+  <thead>
+    <tr>
+      <th>id</th>
+      <th>Nom</th>
+      <th>Exercices</th>
+      <th>Résolus</th>
+    </tr>
+  </thead>
+  {if $themes}
+  <tbody>
+  {foreach from=$themes item=t}
+    <tr>
+      <td>
+        {$t->id}<br>
+	<a href="?delete={$t->id}"><span class="glyphicon glyphicon-trash"></span></a>
+        <a href="/{$SALT_ADMIN}/themes/export?id={$t->id}" role="button"><span class="glyphicon glyphicon-floppy-save"></span> Exporter</a>
+      </td>
+      <td><a href="/{$SALT_ADMIN}/{$t->id}-{$t->name}">{$t->name}</a></td>
+      <td><ul>
+      {foreach from=$t->get_exercicesOrdered() item=e}
+        <li><a href="/{$SALT_ADMIN}/{$t->id}-{$t->name}/{$e->id}">{$e->get_name()}</a></li>
+      {/foreach}
+      </ul></td>
+      <td>FIXME</td>
+    </tr>
+  {/foreach}
+  </tbody>
+  {/if}
+  <tfoot>
+    <tr>
+      <td colspan="6">
+        <a class="btn btn-success" href="/{$SALT_ADMIN}/themes/import" role="button"><span class="glyphicon glyphicon-cloud-upload"></span> Importer</a>
+{if $themes}
+        <a class="btn btn-danger" href="/{$SALT_ADMIN}/themes/?drop" onclick="return confirm('Êtes-vous sûr de vouloir vider la table des thèmes ainsi que les exercices associés ?')" role="button"><span class="glyphicon glyphicon-floppy-trash"></span> Vider</a>
+{/if}
+      </td>
+    </tr>
+  </tfoot>
+</table>
+{/block}