2019 Women's Candidates Tournament, Kazan

I added the recently completed 2019 Kazan Candidates Tournament to my index page on the World Chess Championship for Women. This should have been relatively straightforward, but I ran into complications when I tried to understand the structure of the next cycle.

The information about the next cycle is scattered across different documents and, although it's consistent, I couldn't find a single document pulling everything together. The subdomain for womenchess.fide.com is also hopelessly out of date. I'll come back to this at the same time I update the other data -- PGN and the Index of Women Players -- for the Kazan Candidates event. There might be a basic document that I've overlooked.