Completeness Project Type
This version introduces the "Completeness" project type to the back end and several general improvements.
- Completeness project creation #334 #331
- refactor tutorial creation to allow for multiple project types #354
- refactor manager dashboard to allow for simpler project creations
- Restructure project types and rename classes #357 #358
- add unittests for some functions #361 #270
- derive users statistics per project as and add an api endpoint #335