Misc fixes

[mxstbr]

These should be changed in all examples:

• [x] Underline on hover (the link and @chantastic, though only the chantastic part should be highlighted)
• [x] All links need to go to a new tab
• [x] Use method = () => {} in classes for binding (thanks @kof)
• [ ] Move media queries to separate modules for CSS-in-JS (thanks @kof)