dialog 1.2-20130928

Quick version bump.

If anyone needs a changelog: there have been five releases since our last update, so the upgrade from 1.2-20121230 spans the five [changelog entries][1] labeled `2013/03/15` through `2013/09/28`.

[1]: http://invisible-island.net/dialog/CHANGES-contents.html#t20130928

p.s. I verified the GPG signature provided for the archive against the public key on offer at the author's site:

    $ curl -OO ftp://invisible-island.net/dialog/dialog-1.2-20130928.tgz{,.asc} \
      http://invisible-island.net/public/dickey-invisible-island.txt |
      gpg --import && gpg --verify dialog-1.2-20130928.tgz.asc