Move Andreas to `AUTHORS'.

AUTHORS

@@ -6,6 +6,8 @@ Nix was initially written by Eelco Dolstra; other people have been
 contributing to it.  See `nix/AUTHORS' for details.
 
 GNU Guix was initiated by Ludovic Courtès <ludo@gnu.org>, but it would
-not be what it is without the contributions of the following people:
+not be what it is without the contributions of the following people (in
+alphabetical order):
 
+  Andreas Enge <andreas@enge.fr>
   Nikita Karetnikov <nikita@karetnikov.org>

THANKS

@@ -5,5 +5,4 @@ proved to be inspiring and fruitful.
 Thanks to the following people who contributed to GNU Guix through
 suggestions, bug reports, patches, or general infrastructure help:
 
-  Andreas Enge <andreas@enge.fr>
   Jason Self <jself@gnu.org>