Implemented "user interface" (lol)

- Implemented and fully commented ConsoleUI class.
- Added few fields in Game class.
- Added constructor for Game class.
Merge pull request #2 from Kaendan/development

Merge pull request #1 from Tydax/development
Added a Testcase for the Game class.
Merge branch 'development' of https://github.com/Tydax/game-of-gooses into development