expanded Topic
renamed SubView to AbstractView
documented AbstractView
added Button Statistics, calls to controller
refactored code
documented AppController, implemented askQuestion
implemented renameTopic, added more documentation
removed fields currentTopic and currentBox from AppController
made constructor for singleton class private
refactored renameTopic
added more documentation, reintroduced currentTopic
(almost) implemented deleteTopic
implemented createTopic
refactored the Controllers topic methods (removed topic parameter)
removed unused imports and fields
Don't crash on missing translations anymore. Fixes #11.