I don't really understand #49

Hello, sorry I got couples of questions.
I'm working on a project and I have to display a calendar (start, end and detail). Trying to use this bundle, i face some misunderstandings.

1. What is the purpose of the CalendarEvent (created in the README.md)? When I look at the exemple, I don't see its implementation but it's just used (https://github.com/ancarebeca/full-calendar-example/blob/master/src/AppBundle/EventListener/LoadDataListener.php)

2. Line 43 (of the previous page linked), should I define the "addEvent()" method? (Since the CalendarEvent doesn't exist)

3. Depending on the example branch, what is the difference btwn CalendarEvent and Schedule class ?

4. To add styles and Js, I don't have the bundle in the asset (web) dir. Did I do wrong when installing ? I can't find any style and script anywhere.

Thank you