Reorganization

Add the MealRepartition class
Add calculation method to the MealRepartition class

Add methods to compute the amount of lipids, proteins, carbohydrate in
grams by Meal.
Add a class of test for the MealRepartition class

Uncomment the default constructor of MealRepartition and delete the
getTotalNRJIntakeNeeds method
Add a GUI and a controller to the meal repartition class