gnome-session.doap: Add Iain Lane

Probably/possibily temporarily.

I think I need to do this to be able to make a release, while Ray is
out.

gnome-session.doap

@@ -35,4 +35,11 @@
       <gnome:userid>walters</gnome:userid>
     </foaf:Person>
   </maintainer>
+  <maintainer>
+    <foaf:Person>
+      <foaf:name>Iain Lane</foaf:name>
+      <foaf:mbox rdf:resource="mailto:iainl@gnome.org" />
+      <gnome:userid>iainl</gnome:userid>
+    </foaf:Person>
+  </maintainer>
 </Project>