tbd: description
GET /api/events
Retrieves a list of all Events.
GET /api/events/{id}
Retrieves one specific Event with all the information.
GET /api/companies/
Retrieves a list of all Companies.
GET /api/companies/{id}
Retrieves one specific Company with all the information.
GET /api/companies/{id}/events
Retrieves all Events of one Company.