Added the practical model class
Fixed the one-to-many relationship
Added tests for the one-to-many relationship
Fixed the abundance of white space
Merge pull request #8 from florisverburg/feature_model_practical

Feature model practical
Added basic security login check
Show login/logout message
Added some basic tests
Merge pull request #9 from florisverburg/feature_security

Feature security
Added the practical group to the database model. Also added the many-to-many and one-to-many relationships
Fixed a method used for the one-to-many relation
Added tests for the practicalgroup and his many-to-many and one-to-many relations