Add the date time to the output

Useful when you log the swiftmailer spool sender.
feature #81 Add the date time to the output (Xobb)

This PR was merged into the 2.3-dev branch.

Discussion
----------

Add the date time to the output

Useful when you log the swiftmailer spool sender. You might also want to use the Symfony2 localized date formatting mechanics, but I'm not sure if that's applicapable.

Commits
-------

558a802 Add the date time to the output