Added a global NotificationService to the database instance. Objects can subscribe to this service to be notified of document updates within the database. XQuery expressions should use this to update their internal state if they cache node sets.
Added a global NotificationService to the database instance. Objects can subscribe to this service to be notified of document updates within the database. XQuery expressions should use this to update their internal state if they cache node sets.

svn path=/trunk/eXist-1.0/; revision=1963

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