Release Name: 1.5.0

Notes:
ar_mailer is a two-phase delivery agent for ActionMailer.  Even delivering
email to the local machine may take too long when you have to send hundreds of
messages.  ar_mailer allows you to store messages into the database for later
delivery by a separate process, ar_sendmail.


Changes:
=== 1.5.0

* Added --pid-file option.  See --help for details.
* Minor improvements to --help, argument error output