Added jsdocs

Author: photonstorm

src/gameobjects/particles/GravityWell.js

@@ -12,8 +12,8 @@ var GetFastValue = require('../../utils/object/GetFastValue');
  *
  * @property {number} [x=0] - The x coordinate of the Gravity Well, in world space.
  * @property {number} [y=0] - The y coordinate of the Gravity Well, in world space.
- * @property {number} [power=0] - The power of the Gravity Well.
- * @property {number} [epsilon=100] - [description]
+ * @property {number} [power=0] - The strength of the gravity force - larger numbers produce a stronger force.
+ * @property {number} [epsilon=100] - The minimum distance for which the gravity force is calculated.
  * @property {number} [gravity=50] - The gravitational force of this Gravity Well.
  */
 

src/gameobjects/pathfollower/PathFollower.js

@@ -23,7 +23,6 @@ var Vector2 = require('../../math/Vector2');
  * @property {boolean} [positionOnPath=false] - Whether to position the PathFollower on the Path using its path offset.
  * @property {boolean} [rotateToPath=false] - Should the PathFollower automatically rotate to point in the direction of the Path?
  * @property {number} [rotationOffset=0] - If the PathFollower is rotating to match the Path, this value is added to the rotation value. This allows you to rotate objects to a path but control the angle of the rotation as well.
- * @property {boolean} [verticalAdjust=false] - [description]
  */
 
 /**
@@ -104,7 +103,7 @@ var PathFollower = new Class({
         this.pathOffset = new Vector2(x, y);
 
         /**
-         * [description]
+         * A Vector2 that stores the current point of the path the follower is on.
          *
          * @name Phaser.GameObjects.PathFollower#pathVector
          * @type {Phaser.Math.Vector2}