Deal with changes in Freenode ghosting

Freenode has renumbered IRC events which killed off the ability to
ghost a nick with this script. Fixed this, and disabled the nick
releasing code unique to Freenode as it no longer appears to be
needed.

Fixes #1 / https://github.com/OmegaPhil/kvirc-nickserv-integration-script/issues/1
Version 1.3, updated email address