Added changelog.

Author: plumthedev

changelog.md

@@ -0,0 +1,14 @@
+# changelog
+
+## 2017-04-11 - 1.0.0
+### Added
+- Added PHP CS Fixer Config based on Yii2 ecosystem config.
+- Added PHP CS Fixer Finder which exclude directories which should not fix.  
+## 2017-04-12 - 1.0.1
+### Added
+- Added changelog.
+- Added `yiisoft/yii2` as dependency.
+### Changed
+- Update PHP CS Fixer Config to merge new rules. 
+- Update php-cs-fixer configuration files to add for project header.
+- Update README usage section.