Merge add support for the new xSDK policy R7.

See the updated [xSDK template](https://github.com/xsdk-project/xsdk-policy-compatibility/blob/master/template.md).

+ Add support information in the README.md
+ Add a CHANGELOG.md file which tracks Ginkgo's changes. The full version 1.0.0
description is provided and changes on top of this base version are detailed.

Author: tcojean