moving vcard to mail-lib

[Mike Kupfer]

Hi Simon, there are a couple different mail front-ends that use
vcard.el--most notably, Gnus and VM.  Currently we distribute vcard.el
in the Gnus package, but it seems like it would make more sense to
distribute it in mail-lib.  As you're the maintainer for the mail-lib
package, I wanted to check in with you to see how you'd like to handle
this.  

There's a new version of vcard.el that comes with the latest version of
VM.  It seems to work okay with Gnus, so that's the version I'd like to
get into mail-lib.

Please let me know how you'd like to proceed.

thanks,
mike