Fixed #8

class/sounds/Sound.class

class/sounds/unlocked.mp3

src/achievements/Achievement.java

src/achievements/AchievementCell.java

src/achievements/AchievementHandler.java

src/achievements/NotIncrementalAchievementException.java

src/application/Controller.java

src/application/MainGUI.fxml

src/application/PathSettings.java

src/logic/Game.java

src/logic/Player.java

src/sounds/Sound.java

src/sounds/unlocked.mp3