* pgg.el (pgg-process-when-success): New macro.

* pgg.el (pgg-process-when-success): New macro.
(pgg-insert-url-with-w3): New function.
(pgg-insert-url-program): New variable.
(pgg-insert-url-extra-arguments): New variable.
(pgg-insert-url-function): New variable.
(pgg-fetch-key): Use it.
(pgg-encrypt-region): If called interactively, popup
`pgg-echo-buffer' to display encryption status.
(pgg-decrypt-region): Likewise.
(pgg-sign-region): Likewise.
(pgg-verify-region): Likewise.