Individual conference ICS files

[davedelong]

Based on a comment by @AliSoftware on #219:

Side note / PS: would be nice to use that same ics template to also generate one ics per event and add a link to download it next to each conference in the list, to be able to easily just add the conference(s) one would be interested in instead of all at once

This is possible, but I think it would request a custom plugin for Jekyll, since it's the dynamic creation of files, and not just the dynamic creation of file content.

[AliSoftware]

Maybe instead of creating one ics file per event if that's not possible with Jekyll, we could instead base64-encode the ics content (is there's such a filter in Liquid though?) and use raw data links (data:base64;<content> or something iirc?)