access points for subscribing to application wide events. timeout = 0 for no timeout
initialize an event notifier by name, with an optional timeout
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received(event)
- notifies subscribers about an event firing and passes along the data
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subscribe(*args, **kwdargs)
- register a callback handler for a specific event, starting the timer if != 0, otherwise it will watch until forced to unsubscribe by the caller
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unsubscribe(*args, **kwdargs)
- stop watching this event