edit changelog

Author: SDSTony

CHANGELOG.md

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 # Changelog
 All notable changes to this project will be documented in this file.
 
+#### Release: Tutorial-Book 0.3.0 | Release Date: March. 8, 2021 (FIX Ch. GAN | ADD TRANSLATE BUTTON)
+
+- Reversioning to 0.3.0 for semantic versioning, MINOR version stands for number of chapters
+
+- Changed GAN Ch4 with the new version with preprocessing
+
+- Add translate button and license button on landing page
+
+- Add Reference for GAN
+
+- Initiate NLP chapter
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+
 #### Release: Tutorial-Book 0.1.1 | Release Date: Feb. 16, 2021 (SEVERAL TYPO FIX | MERGE EDITS)
 
 - Fixed GAN chapter name from 색상 이미지 생성 모델 to 컬러 이미지 생성 모델
-
 - Fixed co-author Donghwan's redirection link from Github to Linkedin
-
 - Merged GAN ch1, ch3 second edit issues
 
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