* adds tests for compensations (WIP) * refactors some dummy data generating into base test class * fixes bugs detected by testing * adds important requirements.txt change for itsdangerous package (<1.0.0 for compatibility to django-simple-sso)
* refactors test logic into base test classes * adds tests for views in konova app * fixes bugs/warnings detected by testing
* adds tests for views in intervention app * fixes bugs detected by test writing
