+ Add some comments.

Use a configuration parameter to enable XAConnection instead of relying on connection factory instance.

Bug fix: use a configuration parameter to enable XAConnection instead of checking ConnectionFactory interfaces.

Add a submenu for Joram designer actions.

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- Reworked PoolNetwork to have one Sender by NetSession. This leads to the suppression of nbMaxFreeSender and nbMaxResetTries properties and fixes various sync issues.
- Use the new MessageSoftList class instead of inner MessageList and MessageVector classes.
- Exchange a magic number when starting a connection to identify remote peer.

- Add stamp, messageId fields and delete method to work with messages without reloading them from disk.

- Avoid possible NPE during onMessage method.
- Correct indentation.
- Wait some time before finishing.
- Other minor fixes.