ibrdtn: Remove received DTN time from MetaBundle
daemon: Split raise method of EventDispatcher into raise() and queue()

The semantic behind the standard raise() is more a queuing instead if a direct raise. Now
the methods raise() directly distribute the event to all subscribers while queue() puts the
event into the EventSwitch queue for later distribution.
daemon: Deliver TimeEvent directly to the components
daemon: Add comment to EventSwitch and remove dead code
daemon: Ignore directories while restoring the DataStorage
daemon: Add missing "=" in NodeHandshake
daemon: Add dedicated reason code to BundlePurgeEvent
daemon: Only add bundle to purged set if it is finally delivered
daemon: Add bundle to prophet ack-set if it is purged due to final delivery
daemon: Add bundle purge reason "ACK_RECEIVED"

If a purged event is generated with that reason, the bundle is not added to the
acknowledgement set of Prophet because this should be done during the processing of
the ack'set.