Merge: nitsmell : Add code smell detection

Adding code smell detection :

- Long class
- Long method parameter list
- Long size method
- Feature envy

Adding a visitor to analyse the contents of the methods

Pull-Request: #2445
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Lucas Bajolet <r4pass@hotmail.com>
Reviewed-by: Jean-Christophe Beaupré <jcbrinfo.public@gmail.com>