Include data on meetings

[dontcallmedom]

via the W3C calendar

[dontcallmedom]

the W3C API doesn't expose events; the ICS exports (whose url can be constructed as groups/[w|i|b|c]g/[shortname]/calendar/export/) could work (they don't link to minutes though)

[dontcallmedom]

see also w3c/w3c-api#148 and w3c/calendar#110