documentation
Added the Word class with a corresponding Test class.
Added a LogInitializer that configures the root Logger.
Added documentation.
Added Logging inside the InitializingService.
Improved Logger configuration.
Removed obsolete class.
Added a "Statement.close()" in ChallengeMapper.
Implemented the WordMapper.
Various Improvements on the Contract Model.
Implemented the WordRepository.
Wired the WordRepository everywhere.
added the wordValidator in the repository
backend stuff works, only thing left is better interface
refactored some duplicated code into a new class EditableListCell.
it uses an EditableLabel and provides a cleaner interface to its
subclasses.
WordCellUI now subclasses this new class.
Also added some documentation.
The Save button on the Word Pool UI is now disabled if duplicate words
are entered.