allow users to create events

[pythonbrad]

Description

A user should be able to propose an event to be published in place.
After the proposal, the user should be able to edit it until the event is approved.
After approval, the event can still be edited, but will go back to the not approved state.

[Tokomichel]

The issue is to forbid not admin user to create other user or to allow them to do that?

[pythonbrad]

The issue is to forbid not admin user to create other user or to allow them to do that?

@Tokomichel, the issue is to implement the part of code to allow a user to create an event.