Linking to other events

[martinheidegger]

In the current event series prepared by @RobertvBraam we have different events in a series and it would be cool/good to link the events in the description. In the description format, could there be a way how I specify a link between the events?

[kurisu-dotto-komu]

Yeah, we can add something like this.

The simplest way is to just have a 'series' string in frontmatter that they all share.

This could also be used to trim the title name down and include the series name as a subtitle.

Related to #87 #67