Fixed styling of a:active in menu
Improved text
Improved scrolling behaviour
Removed Euler characteristic from surfaces list
Visual indication of which surface is active
Merge branch 'master' of https://github.com/jcommelin/superficie-algebriche
Fixed wrong behaviour of surfaces list

And 2 minor fixes.
Fixed #1

Actually easier than expected!
Visual indication of when a surface has examples
Merge branch 'master' of https://github.com/jcommelin/superficie-algebriche