Add wpseditor, the Google Summer of Code 2008 project of Rostislav Chekan. Closes FS#9327


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18362 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index f9bacd5..2d73b63 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -413,6 +413,7 @@
 Clément Pit-Claudel
 Jelle Geerts
 Tadeusz Pyś
+Rostislav Chekan
 
 The libmad team
 The wavpack team