Merge pull request #152 from apiaryio/kylef/changelog

Introduce a CHANGELOG

Author: w-vi

CHANGELOG.md

@@ -0,0 +1,12 @@
+# Protagonist Changelog
+## Master
+
+## 1.3.3
+
+This update now uses Drafter 2.3.1 Please see [Drafter
+2.3.1](https://github.com/apiaryio/drafter/releases/tag/v2.3.1) for the list of
+changes.
+
+## 1.3.2
+
+This update adds support for node.js 5 and 6.