* riece-epg.el

* riece-epg.el
(riece-epg-passphrase-callback-function-for-decrypt): New
function.
(riece-command-set-passphrase): Renamed.
(riece-epg-message-filter): Don't query passphrase; if decryption
fails add button to try again.
(riece-epg-add-encrypted-button): New function.
(riece-epg-encrypted-button-notify): New function.