Argo data documentation is replicated on GitHub

The Argo data management documentation page is replicated on GitHub to improve its accessibility:

• https://github.com/euroargodev/Argo-data-management-documents

The documentation page is still managed on Argo data management documentation page:

• http://www.argodatamgt.org/Documentation

In the medium term, it could be transferred to GitHub. It provides access to the latest versions of Argo Data Management Team documents.