Move myself to former developers.

git-svn-id: http://svn.irssi.org/repos/irssi/trunk@5102 dbcabf3a-b0e7-0310-adc4-f8d773084564

AUTHORS

@@ -8,10 +8,13 @@ Irssi staff (current maintainers) <staff@irssi.org>:
   Wouter Coekaerts (coekie)
   Jochen Eisinger (c0ffee)
   Geert Hauwaerts (Geert)
-  Emanuele Giaquinta (exg)
   Jilles Tjoelker (jilles)
   Alexander Færøy (ahf)
 
+Former developers:
+
+  Emanuele Giaquinta (exg)
+
 Large feature patches by:
 
   David Leadbeater (dg, dgl) : isupport