** defcustom, defface and defgroup now accept the keyword `:version'.<BR>
Use this to specify in which version of Emacs a certain variable's
default value changed.  For example,
<P>
   (defcustom foo-max 34 "*Maximum number of foo's allowed."
     :type 'integer
     :group 'foo
     :version "20.3")
<P>
   (defgroup foo-group nil "The foo group."  
     :version "20.3")
<P>
If an entire new group is added or the variables in it have the
default values changed, then just add a `:version' to that group. It
is recommended that new packages added to the distribution contain a
`:version' in the top level group.
<P>
This information is used to control the customize-changed-options command.
<P>