add CHANGELOG.md

Péter Hauszknecht · Péter Hauszknecht · commit 82ac88bd9abb · 2017-09-25T12:02:57.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
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+# Change Log
+
+This project adheres to [Semantic Versioning](http://semver.org/).  
+Every release, along with the migration instructions, is documented on the Github [Releases](https://github.com/jaystack/repatch/releases) page.
