Change description to show code exists for multiple languages

[akkineniramesh]

now only R is shown beside this repository name, if we click to show all your repos. if possible change the description to show that other language code exists in this repo. maybe like "code in julia, R, python, Ruby for my book on Multi-Armed Bandit Algorithms"

[johnmyleswhite]

I don't control this: it's automatically inferred by GitHub. If you know of an UI element for editing this, let me know.