Added some more contributors


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3818 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index 7a1ffc7..6c2961e 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -69,3 +69,8 @@
 Jörg Hohensohn
 Dave Jones
 Thomas Paul Diffenbach
+Roland Kletzing
+Itai Shaked
+Keith Hubbard
+Benjamin Metzler
+Frederic Dang Ngoc