Adds czech edition info to https://www.goodreads.com book info box.
How to add: Install tempermonkey addon "https://chrome.google.com/webstore/detail/tampermonkey/dhdgffkkebhmkfjojejmpbldmpobfkfo?hl=cs" for Chrome, or https://addons.mozilla.org/cs/firefox/addon/greasemonkey/ for Firefox.
Click on this link: "https://raw.githubusercontent.com/lbehal/GoodReadsLanguageEdition/master/GoodReadsLngExt.user.js".
