import bunch of challenges
Ruby cookbook
Typo, fixes, precisions
Merge pull request #79 from lewagon/2-OOP-8-cookbook

Ruby cookbook
Merge branch 'master' of github.com:lewagon/promo-2-challenges
Merge branch 'master' of github.com:lewagon/promo-2-challenges
fix on spec
Merge branch 'master' of github.com:lewagon/promo-2-challenges
at last