Increment version, cleanup and changelog for release 2.1.0

This patch provides new changelog notes for the next release. It also does some
cleanup:

* Move CHANGELOG.md to Changelog so it gets rendered in the forge
* Fix LICENSE so only the necessary boiler plate gets displayed in the Forge

And finally it increments the Modulefile version to 2.1.0.

Signed-off-by: Ken Barber <ken@bob.sh>