#24 - Added changelog to project.

CHANGELOG.md

@@ -0,0 +1,9 @@
+![Mollie](https://www.mollie.com/files/Mollie-Logo-Style-Small.png)
+
+### Changelog
+
+All notable changes to this project will be documented in this file.
+
+#### v1.2.2 - 2016-03-21
+  - The members `customers` and `customers_payments` weren't made public within `attr_reader` ([#21](https://github.com/mollie/mollie-api-ruby/pull/21)).
+  - Updated the bundled CA's cacert.pem file to date `Jan 20, 2016`.