Big Update : Make the plugin more realistic.

-Add a fatigue rate. This will add a nb of fatigue to the player who are
connected. When he is disconnect or sleep or sit on chair, it will
remove the nb fatigue rate to his fatigue.
-Remove all method, variables about time.
-Add a new method to remove effect on player.
-Move all scheduler in the main class to call it one time. They will be
a repeated scheduler.
-More fixes in code.