Merge branch 'fix-strings' into 'master'

Make string translateable. Closes #82.

Closes #82

See merge request Teckids/BiscuIT/BiscuIT-ng!46

biscuit/core/templates/core/person_full.html

@@ -62,7 +62,7 @@
           {% endcomment %}
       </table>
 
-      <h3>Groups</h3>
+      <h3>{% blocktrans %}Groups{% endblocktrans %}</h3>
       {% render_table groups_table %}
 
     {% else %}