Added modifications of the 1.2.1 version

Author: Cleberson Ramirio

CHANGELOG.md

@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.2.1] 2015-10-11
+### Added
+- Article Git - the simple guide to the prerequisite section.
+
 ##[1.1.1] 2015-10-11
 ### Fixed
 - Fix typos