Releases for AES encryption

Finally, here it is, AES ported to Drupal 6. This is basically the same version as 1.2 for Drupal 5, but it also has a couple of small bugfixes and changes, which is why it's called 1.3.

Bugfixes:
* AES no longer alerts the user about a missing key if the user does not have the administer aes permission. This alert is now also logged in the watchdog.
* Fixed a bug which caused AES encrypted passwords to be created even when this feature was turned off if an existing account was given a new password.

* Fixed a faulty use of preg_match which caused a warning in PHP 5.2.x.
* A users encrypted password is now deleted along with the user.
* Removed a redundant write to file when saving a key using the file storage method.
* Fixed the anonymous account receiving an encrypted password in some situations.
* Removed an unused menu item.

* Added option to use 192 or 256 bit versions of the Rijndael algorithms.
* Drupals database abstraction layer is now used properly.
* Added (untested) support for Windows.
* AES-encrypted passwords are now stored separately in their own table instead of replacing the MD5 passwords in the users table.
* Added option to show the decrypted password on another page.
* Plus some other minor changes.

Initial release.