Log Message:
Update EasyPG to 0.0.16.

Changes since 0.0.14:
* epa-mail-encrypt now skips unusable keys.
* epa-file now uses canonical file names as keys for passphrase cache.
* Fixed a load-error of epa on XEmacs.
* epa-file bug fixes.
* Prepare auto-mode-alist to strip .gpg suffix when choosing major-modes.
* Don't signal an error when opening a nonexistent file via Tramp.
* epa-verify-region now decodes the plaintext with
  coding-system-for-read or one saved as epa-coding-system-used.