v1.9.0

• Add rest password process for users which have registered through email. The user receives an email containing a link with a token which can be used to change the current password
• Renamed column period to period_type for MariaDB compatibility #252
• Return refresh token for simple login and add option extend an existing access token #264
• Restructured clean command to remove expired database entries i.e. app token instead of removing the demo files
• Added specific scopes to backend/consumer endpoints to allow access to only specific parts of the backend/consumer API
• Add option to request concrete scopes for backend and consumer authorization
• Expired JWT return proper 401 status code #268