Merged Tests into master
Merge branch 'master' of github.com:utwente-di/di18
Fixed own branch
Comment fix
Tools fix
Tools fos fix
Added methods to get fields of study and skills
Added support for transactions (managed connections) and fixed all known bugs
Merge branch 'database' of github.com:utwente-di/di18
Merge branch 'master' of github.com:utwente-di/di18 into frontend
Fixed merge conflicts