Version 2.6.4

I've done some work on the code today. The changes are mostly internal and will allow me do some more analysis of cardinals over time. There are two visible changes. On the page for someone that was created a cardinal and then later resigned that dignity, the length of service as a cardinal is now correct.

The second change is that on the Pope pages, there is a new column named "Conclave Start" which has the date and a link to the page for that conclave (if I have one on the site).

If you happen to see any strange side effects (probably involving cardinals), please let me know via the usual feedback page.