   ###*
   @name ZERO
   @fieldOf Point
-
   @returns {Point} The point (0, 0)
   ###
   Point.ZERO = Point()


  @name fromAngle
  @fieldOf Point

  @param {Number} angle The angle in radians
  @returns {Point} The point on the unit circle.
  ###

  that the dude standing at p1 will need to face to look at p2.

  <code><pre>
  p1 = Point(0, 0)
  p2 = Point(7, 3)

  Point.direction(p1, p2)
  # => 0.40489178628508343
  </pre></code>

  @name direction
  @fieldOf Point
  @param {Point} p1 The starting point.
  @param {Point} p2 The ending point.
  @returns {Number} The direction from p1 to p2 in radians.
