Created vi-VN directory for Vietnam Code Club
Vietnamese translation: Felix and Herbert
Vietnamese translation: Ghostbusters.md

Translator: Hana <hp.bluerose AT gmail DOT com>
Vietnamese translation: Firework

Translator: Huyen <tranlanhuyen AT gmail DOT com>
Merge branch 'master' of https://github.com/codeclubvietnam/scratch-curriculum into codeclubvietnam-master
Merge branch 'codeclubvietnam-master'