NEW Transition
	Transition(el, options)

	run(props)

	options
		fps: 50
		easing: 'ease',
		duration: 0.5
		fakeStepInterval: 100

	events
		start
		step
		end

NEW Draggable
	Draggable(element, dragStartTarget)

	enable()
	disable()

	events
		dragstart
		predrag
		drag
		dragend

NEW IProjection
	project(latlng)
	unproject(point)

NEW ICRS
	latLngToPoint(latlng, zoom)
	pointToLatLng(point, zoom)
	project(latlng)
	scale(zoom)