Removing the requirement of a version in the notification body.

It will no longer be mandatory to have a version property in the PUT
request body. Instead, if the version property is left out the server
will generate a UTC date for the version which will be delivered to the
registered channel.

[https://issues.jboss.org/browse/AGSMPLPUSH-54]
Making NotificationHandler's thread pool bounded.

- The size is of the thread pool is configurable.

[https://issues.jboss.org/browse/AGSMPLPUSH-55]
Changing the fileformat to unix instead of dos.