Code simplification

[BAKFR]

What's the point of using an EventEmitter in the engine ?

zenbot/boot.js

Lines 37 to 38 in 6c92f2b

	var eventBus = new EventEmitter()
	zenbot.conf.eventBus = eventBus

zenbot/lib/engine.js

Lines 22 to 24 in 6c92f2b

	let eventBus = conf.eventBus
	eventBus.on('trade', queueTrade)
	eventBus.on('trades', onTrades)

There are 3 events: trades, trade and orderExecuted.
The trades event is not used anywhere and can be removed.
Both trade and orderExecuted have only one listening function and could be replaced by a direct call to these functions.

Am I missing something ?