New signature feature and self-promotion.

New signature feature and self-promotion.

This patchset brings some shameless self-promotion by adding a byline to
the bottom of a post: "Posted via: SXEmacs/LJ (version string)".  It is in
a fairly small font and out of the way so should be reasonably
inconspicuous, but you can turn it off if you want to with...

  (setq lj-self-promote nil)

There's a new user variable, `lj-signature', the value of which is
inserted at the bottom of the post buffer if it is non-nil.  It is
inserted verbatim, so making it pretty (HTML formatting) is up to the
user.

    	* lj.el (lj-byline): New.  Nothing wrong with a bit of
	self-advertising, I reckon. ;-)

    	* lj.el (lj-self-promote): New.  When non-nil tell the world that
    	you use sexy software.

    	* lj.el (lj-post): Optionally add the byline.

    	* lj.el (lj-preview): Include byline in preview.

    	* lj.el (lj-validate): Ditto.

    	* lj.el (lj-signature): New.  Lets you include a sig at the bottom
    	of a post.

    	* lj.el (lj-generate-new-buffer): Insert the signature if it is set.

    	* lj.el (lj-version): Bump.

Signed-off-by: Steve Youngs <steve@sxemacs.org>