Enable plugins on the Sansa C200. Large parts taken from patch FS#7749 by Max Kelley with tweaks, bit of cleanup and additional bitmaps by me. Some of the now enabled plugins could still be improved in regard to screen size adaptation or keymaps but this way it can easily be done later and one by one. The rather ugly 'ifndef's I added temporaryly in plugins/SOURCES will also go one by one. Plugin button actions cause some quirks in a few plugins (e.g. 'clock') but since it's not critical , the bitmaps were already done and it makes a good example for discussing plugin button actions, I thought it could go in.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14771 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index 9edfa7f..edbea35 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -331,6 +331,8 @@
 Costas Calamvokis
 Catalin Patulea
 Peter Harley
+Max Kelley
+
 The libmad team
 The wavpack team
 The ffmpeg team