code: function angleToPoint(v) {
           var a = this.getBounds(); // the me.Vector2d object also implements the same function, but
           // we have to use here the center of both entities
  
           var ax = v.x - (a.pos.x + a.width / 2);
           var ay = v.y - (a.pos.y + a.height / 2);
           return Math.atan2(ay, ax);
         }
docs: return the angle to the specified point
  @name angleToPoint
  @memberOf me.Entity
  @function
  @param {me.Vector2d} vector vector
  @return {Number} angle in radians