[#69803026] Switch to Event methods for fetching

Reimplement methods from event to fetch startup events.
Update methods on event to top using map reduce and use countries as a
query instead.
[#69803026] Add some test cases to verify fetching
[#69803026] Little more scroll space

Fetch events earlier in scroll
Fetch more events
Merge pull request #136 from Forekasting/server_event_fetching

Server event fetching