Several changes

- Store all the scores of the players in an array
- Created functions to get the main scores
(getTotalScoreOfPlayerInGivenRound,
getTotalScoreOfPlayerInCurrentRound, getTotalScoreOfPlayerInAllRounds)
- Modified the leaderboard to use this array of scores
- Display the score of the player after the answers are shown
- Modified the levenshtein in the open question scoring