Feature
* Implement copydocumentmutation (613ccd3b5962d5068a49ee44090e265786feee01)
It is now possible to copy documents
* Split settings file (c80cb4f3523fe8defc4befbe563905f9e0eb285d)
Useful for integrating caluma as a django app
* Increase max-length of slugs to 150 (5dbfff523d6486166c8e115071ca526bbd7c60e4)
* Add support for minlength validation (4d67bcefc9659932f8edfd28f4864074c969cc95)
Fix
* Do not validate row documents when attaching them (fee356ae9549ca0bf4df4a18f9d260f8dd544569)
* Do not crash when lamenting invalid form slug (42ce73cf3049c0305efae4d35807cc5f7a982deb)
* Handle is_required correctly in nested questions (cb78c0836d6d354aa78a6458a70ca660f6d7b32b)
Documentation
* Add docs about usage of django apps and interfaces (c164ed340db0b7e1a2f8ca49bdc973ff8b8b8f90)
* Add hint about snapshot updates and xdist (c0269950f1261884786306c013bd01945fee6498)