Update CHANGELOG.md

Author: photonstorm

CHANGELOG.md

@@ -106,6 +106,7 @@
 * `Body.scale` is a new vector that holds the most recent scale values as passed to `Body.scale`.
 * `Matter.Bodies.flagCoincidentParts` is a new function that will flags all internal edges (coincident parts) on an array of body parts. This was previously part of the `fromVertices` function, but has been made external for outside use.
 * `PhysicsEditorParser.parseVertices` now uses `Bodies.flagCoincidentParts` to avoid duplicating code.
+* `MatterGameObject` has a new optional boolean parameter `addToWorld` which lets you control if the Body should be added to the world or not. Useful for toggling off should you be merging pre-existing bodies with Game Objects.
 
 ### Updates