Created Tag domain.
Generated database table for the Tag domain.
Implemented unit-tests for Tag domain.
Fixed typo.
Created Question domain.
Generated database table for the Question domain class.
Implemented unit-tests for the Question domain.
Updated unit-test for Tag.
Optimized imports.
Created Answer domain.
Implemented unit-tests for Answer.
Generated database table for Answer domain class.
Fixed migration scripts.
Created AnswerController and QuestionController.
Implemented unit-tests for QuestionController.
Created QuestionService
Implemented unit-tests for UrlMappings.