(Customization Types): Merge in some menu descriptions from elisp.texi.

doc/lispref/ChangeLog

+2009-07-10  Glenn Morris  <rgm@gnu.org>
+
+	* customize.texi (Customization Types): Merge in some menu
+	descriptions from elisp.texi.
+
 2009-07-09  Glenn Morris  <rgm@gnu.org>
 
 	* back.texi: Don't hard-code texinfo location.

doc/lispref/customize.texi

@@ -513,11 +513,12 @@ equivalent to @code{(string)}.
 Introduction, widget, The Emacs Widget Library}, for details.
 
 @menu
-* Simple Types::
-* Composite Types::
-* Splicing into Lists::
-* Type Keywords::
-* Defining New Types::
+* Simple Types::            Simple customization types: sexp, integer, number,
+                              string, file, directory, alist.
+* Composite Types::         Build new types from other types or data.
+* Splicing into Lists::     Splice elements into list with @code{:inline}.
+* Type Keywords::           Keyword-argument pairs in a customization type.
+* Defining New Types::      Give your type a name.
 @end menu
 
 @node Simple Types