Expose "conference_title" in "recent" Public JSON API

[TobiGr]

Currently, only the conference_url is exposed. When showing info about an event, users should see the conference name.
At the moment there are videos of 7 different conferences, this means a 7 requests need to be made. Since conference requests can be quite large, this slows down applications and also puts unnecessary load on your servers.

[TobiGr]

Would that be enough to expose conference_title?

diff --git a/app/views/public/shared/_event.json.jbuilder b/app/views/public/shared/_event.json.jbuilder
index 879dbee..d8a99ba 100644
--- a/app/views/public/shared/_event.json.jbuilder
+++ b/app/views/public/shared/_event.json.jbuilder
@@ -8,6 +8,7 @@ json.thumbnails_url event.get_thumbnails_url
 json.frontend_link frontend_event_url(slug: event.slug)
 json.url public_event_url(id: event.guid, format: :json)
 json.conference_url public_conference_url(id: event.conference.acronym, format: :json)
+json.conference_title event.conference.title
 json.related(event.related_events) do |related_event|

I did not test the changes and have no time to set the whole project up. Whoever is responsible for this repo might be able to test this within a few seconds.