added word reference API key in the readme.md fixes #6
Merge pull request #16 from lewagon/wordref-apiuse-doc

added word reference API key in the readme.md fixes #6
Merge branch 'master' of github.com:lewagon/fullstack-challenges
Typo
Merge branch 'master' of github.com:lewagon/fullstack-challenges
Add 300 / 400
Merge branch 'master' of github.com:lewagon/fullstack-challenges
Add open sans for 2 other exercises
Merge branch 'master' of github.com:lewagon/fullstack-challenges
tout est commit