Changes to allow easy interactive debugging in Eclipse.
Merge pull request #26 from sergeds/master

Changes to allow easy interactive debugging in Eclipse.
Respects the synchronized modifier of a method.
Merge pull request #27 from sergeds/master

Respects the synchronized modifier of a method.
Add gwt/hibernate custom serializers
Add support for PersistentBag
Add sessions jar to the console classpath, to allow SessionExpiredException to pass through
Properly differentiate between SessionExpiredException and other errors.
Handle ctrl-D properly to close the input
Clean up sessionData when cleaning up sessions
Mailer: Add support for sending attachments