Translations:Download from Git/18/en

Remote branches are used to track the MediaWiki versions used on the Wikimedia Foundation server cluster. The latest may not be entirely stable, but they receive very quick bug fixes and are generally stable enough - after all, these are what major projects such as Wikipedia are using. Once a REL* branch is considered 'stable', we 'tag>#MediaWiki_tags_.28stable_version.29|tag' it and turn it into a tarball release.