Update links, libraries and code
ℹ️ Upgrading Notice ℹ️: We switch to the new and local versions of jQuery 3.2.1 and clipboard.js 1.7.1, which you have to download as described in INSTALL.md.
ℹ️ Upgrading Notice ℹ️: We switch to the new and local versions of jQuery 3.2.1 and clipboard.js 1.7.1, which you have to download as described in INSTALL.md.