Supprimer Warnings c++11

[aroquemaurel]

Exemple :

/home/aroquemaurel/projets/qt/Fact/FactDev/src/database/database.h:40: avertissement : dynamic exception specifications are deprecated in C++11 [-Wdeprecated]
     static Database* instance(bool tests=false) throw(DbException*);
                                                 ^~~~~