Local events feed (Happenings)

Resubmitting after review
Ehhh, loading all the events is not the most direct way to do this. A common pattern in tests is this:

```
Given /I am attending an event/ do
  @showing = create(:showing, user: @user)
  @event = @showing.event
end

Then /I should see the event link/ do
  expect(page).to have_content(@event.name)
end