Update readme and changelog for release

Update woo tested version

Release 6.1.1

* Fix - Default css class in container

Merge pull request #77 from MONEI/feature/add-multibanco-method

Release 6.1.0

Update version to 6.0.0

Roll back to previous version in .org

Chore: release 5.9.0

Release 5.8.13

Release 5.8.12

Release 5.8.11