deploy_latest_as_release_or_milestone

copy download.eclipse.org/gemoc/*/nightly to download.eclipse.org/gemoc/*/[milestones|releases]/<latest-tag>
where latest-tag is obtained from master branch of gemoc-studio
DO NOT LAUNCH THIS SCRIPT WITHOUT ADDING A TAG FIRST ! (IE. DESACTIVATE IT AFTER USAGE TO PREVENT INAPPROPRIATE USAGE)