Add contributors to the default theme to the credits.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16440 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index 0d3e7c8..de8566b 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -371,6 +371,14 @@
 Chelo Sacristán
 Sascha Wolf
 Nickolay Jordanov
+Johannes Voggenthaler
+Marc Guay
+Alex Vanderpol
+Jerry Lange
+Yohann Misquitta
+Keith Perri
+Mark Fawcus
+
 
 The libmad team
 The wavpack team