RiskProject 0.87

updated GameGUI.java
- mouseListener fully functional as of now

updated DomainController
- added method getGame()
- added method getGameSquareRepository()
- added getUser(int index)
- added getGameSquare(int x, int y)
- added getArmy(int x, int y)
- added getContinentNumber(int x, int y)

updated Game.java
- added getGameSquare(int x, int y)
- added GetUser(int index)
- added getGameSquareRepository()

updated Land.java
- added toString()

updated User.java
- added toString()

updated Water.java
- deleted unused import: java.awt.Color

updated GameSquareRepository.java
- added getArmy(int x, int y)
- added getContinentNumber(int x, int y)

updated UserRepository.java
- added getUser(int index)