Register taskq handlers (simple)

queue.go

app := beehive.NewApp("taskq")
app.Handle(Enque{}, EnQHandler{})
app.Handle(Deque{}, DeQHandler{})
app.Handle(Ack{}, AckHandler{})
app.Handle(Timeout{}, TimeoutHandler{
	ExpDur: 60 * time.Second,
})

// Detached runs a local go-routine, and NewTimer 
// creates a "detached" handler that calls the function
// every 30 seconds.
app.Detached(beehive.NewTimer(30*time.Second, func() {
	beehive.Emit(Timeout(time.Now()))
}))