Bump version to 0.9.0

* image cut
* Add screenshots for project submission and admin interaction to README
* Translate README to English, keep Czech version as README.cs.md
* Support multiple STATUS_TOKENS for /api/summary endpoint
* Allow any logged-in user to access admin index page
* Redirect to login when JWT expires on admin index page
* Include assessment in close notification email and message
* Fix form.action shadowed by input[name=action] in disallow form
* Use location.href=referrer to force fresh page reload after admin actions
* Add /api/summary endpoint for external status clients
* Go back instead of index after confirm/close/disallow actions in admin