message: Update README.md
  Use yarn
diff: @@ -10,12 +10,13 @@ Translations are done by the community. If you want to participate, feel free to
  ### Building
  -- Install NodeJS v6
  +- Install NodeJS v6+
  +- Install Yarn
  - Run in terminal:
  - `git submodule init`
  - `git submodule update`
  - - `npm i`
  + - `yarn`
  - `./node_modules/.bin/gulp translations:compile`
  - - `npm run dev`
  + - `yarn run dev`
  That should set up a tiny server that hosts the website for you on your computer at http://localhost:8080. Open that URL up in a web browser and you should have Game Jolt running!
  