Avoids dependency to OSGi API.
Implementation of ServerLock and Transaction initialization.
Implementation of configuration update and backup from external tools.

Adds a lenient mode for delayed redeliveries, and undeliverable message.
These behaviors are optional through 2 properties:
 - org.objectweb.joram.mom.messages.lenientRedeliveryDelay
 - org.objectweb.joram.mom.messages.lenientUndeliverable
By default, the strict behavior of JMS specification is applied.

Send multiples contents to test jmsTool, and exportMessages.
Send delayed messages.

Allows to view and browse delayed messages.
Allows to export messages in JSon format.
No longer use specific iterator to browse deliveries.
Enhancements in messages denying.