Don't publicly document Sprite constructor. Fixes #63.

lib/p5.play.js

@@ -716,14 +716,10 @@ deltaTime = ((now - then) / 1000)/INTERVAL_60; // seconds since last frame
    * A Sprite can have a collider that defines the active area to detect
    * collisions or overlappings with other sprites and mouse interactions.
    *
+   * To create a Sprite, use
+   * {{#crossLink "p5.play/createSprite:method"}}{{/crossLink}}.
+   *
    * @class Sprite
-   * @constructor
-   * @param {Number} x Initial x coordinate
-   * @param {Number} y Initial y coordinate
-   * @param {Number} width Width of the placeholder rectangle and of the
-   *                       collider until an image or new collider are set
-   * @param {Number} height Height of the placeholder rectangle and of the
-   *                       collider until an image or new collider are set
    */
 
 function Sprite(pInst, _x, _y, _w, _h) {