Fastclick

Mobile browsers have a 300ms delay before they fire a tap event. That’s why everything feels sluggish. This library takes care of that: https://github.com/ftlabs/fastclick
Thanks to @skddc for the pointer!

@jorin-vogel can you check if I included that correctly? Previously I included it in the »paths« block above, but then it wasn’t called. Also, I wonder if it is a good idea to try to check and only call this on mobile browsers, for performance reasons? Maybe it doesn’t matter.