Usage:
var player = new Rect(0, 0, 100, 100);
var target = new Rect(50, 50, 100, 100);
player.is = new AABB(player);
player.is.inside(target);
player.is.colliding(target);
player.is.containing(target);
Union & Intersect from https://github.com/johnhornsby/geom/blob/44f9989bb964e51ce3e5f55027b415c28f3edffd/src/rectangle.js
thats pretty awesome, nicely done.