function getSupport(a, b, direction) {
        return sub(supportPoint(a, direction), supportPoint(b, minus(direction)));
    }
Checks if two paths have an intersection by checking convex hulls
collision using Gilbert-Johnson-Keerthi distance algorithm
http://entropyinteractive.com/2011/04/gjk-algorithm/

@param {Array} path1 JS path representation
@param {Array} path2 JS path representation
@return {Boolean}