Linking the duel between the players

- Modified Round Accesors
- Added Player toString
- Creating a Round from its Id
- Doesn’t create a Duel between players if the 2 players are already
playing
- Updates the active player
- Style in the Questions
- Changed idDuel to Int
Merge origin/master

Conflicts:
	duel-quiz-client/src/duel/quiz/client/controller/PlayerController.java
	duel-quiz-client/src/duel/quiz/client/controller/QuestionController.java
	duel-quiz-client/src/duel/quiz/client/view/DuelQuizClientMain.java
	duel-quiz-server/src/duel/quiz/server/DuelQuizServerMain.java
	duel-quiz-server/src/duel/quiz/server/model/dao/DuelDAO.java
	duel-quiz-server/src/duel/quiz/server/model/dao/PlayerDAO.java
Merge origin/master

Conflicts:
	duel-quiz-client/src/duel/quiz/client/controller/PlayerController.java
	duel-quiz-client/src/duel/quiz/client/controller/QuestionController.java
	duel-quiz-client/src/duel/quiz/client/view/DuelQuizClientMain.java
	duel-quiz-server/src/duel/quiz/server/DuelQuizServerMain.java
	duel-quiz-server/src/duel/quiz/server/model/dao/DuelDAO.java
	duel-quiz-server/src/duel/quiz/server/model/dao/PlayerDAO.java