Move the menu structure to the appendix. The menu structure description itself, is still missing though

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18059 a1c6a512-1295-4272-9138-f99709370657
diff --git a/manual/appendix/menu_structure.tex b/manual/appendix/menu_structure.tex
new file mode 100644
index 0000000..9c89d03
--- /dev/null
+++ b/manual/appendix/menu_structure.tex
@@ -0,0 +1,2 @@
+\chapter{Menu Overview}
+\fixme{include an overview of the menu structure here}