Add destroy method API

[xuexb]

In some scenarios, we may need to actively destroy Driver instances, and these events should also be unregistered.

driver.js/src/index.js

Lines 86 to 103 in 4a0247e

	/**
	* Binds any DOM events listeners
	* @todo: add throttling in all the listeners
	* @private
	*/
	bind() {
	this.window.addEventListener('resize', this.onResize, false);
	this.window.addEventListener('keyup', this.onKeyUp, false);
	// Binding both touch and click results in popup getting shown and then immediately get hidden.
	// Adding the check to not bind the click event if the touch is supported i.e. on mobile devices
	// Issue: https://github.com/kamranahmedse/driver.js/issues/150
	if (!('ontouchstart' in document.documentElement)) {
	this.window.addEventListener('click', this.onClick, false);
	} else {
	this.window.addEventListener('touchstart', this.onClick, false);
	}
	}

[kamranahmedse]

We just released v1.0 of driver.js which has been rewritten from the ground up. We do have a destroy method. Please have a look at the docs and do let me know if you face any issues.