Update changelog.

Author: jcs090218

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
 
 
+### 2020-07-10
+
+* Implemented game data structure => `JCS_GameData`.
+* Updated game settings for creating all necessary path/folders.
+
 ### 2020-07-07
 
 * Added struct for loaded image/sprite data => `JCS_LoadedSpriteData`.