Upgraded bundle to the new one compatible with admin bundle:
- EventControlController use Crud annotation and extends CrudController now - inherit all default actions.
- Rewrited BtnEventExtension - its extends AbstractExtension from BaseBundle now.
- Rewrited DI Configuration. Added new node - event.
- Created a new Event entity which extends AbstractEvent class now. Removed not used properties.
- Created new control fomr class EventControlForm which extends AbstractForm now. Rebuild formBuilder.
- Rewrited EventContentProvider to NodeContentProvider. Added new methods. Its use entity Provider now.
- Added new configuration files with all necessary definitions.
- Changed translations - added/edited keys. Deleted old ones.
- Removed not used files: EventManager, templates, form class.