I don't really like the icon chosen for this, but the one I would prefer is not yet included in the icon package used in Tobira.
The box shadow for the thumbnails is also debatable. I left it in so you can play around with it and see if you can find a nicer looking one.
The series entries look samewhat empty when there is no description, but we discussed adding some metadata like a (potentially shortened) list of creators of events in that series and maybe also/alternatively direct links to the first few events, but this is tbd in another PR.
This adds series to search results.
Couple of notes:
Closes #360