Dead links in the documentation

[sjakobi]

http://www.cs.uu.nl/wiki/GenericProgramming/SYB is referenced from multiple places in this package but sadly is a dead link nowadays.

I think it would be good to replace these links with their webarchive versions.

Explicit references to the SYB papers would make it easier to find them.

[Bodigrim]

Just for the record, because links to the paper from webarchive are dead as well:
https://www.microsoft.com/en-us/research/wp-content/uploads/2003/01/hmap.pdf
https://www.microsoft.com/en-us/research/wp-content/uploads/2016/07/gmap3.pdf

On the other hand, I have no idea how closely syb follows the papers these days.

[yaitskov]

if the paper by the link is not relevant why not just remove it?

[hasufell]

I tried to use this library, but the README is basically empty and the links dead. Is there any kind of documentation apart from academic papers?