Merge pull request #143 from sgmap/master

Améliorations, bourse des collèges et mensualisation des minima sociaux
Add function reference_input_variable into base modules (to replace obsolete build_column).
Clean and upgrade surveys to new syntax
WIP
Some fix, still WIP
Changing sali to sal in test_niches to focus test on niches
Working on allegement_fillon
Fix cice
Enhance test_allegement
Adding recouvrement progressif allegement fillon
Remove unused variables
Change sali to sal in test_irpp
Remove unused variable and some cleaning
Merge pull request #145 from LucileIPP/master

Remove unused variable and some cleaning
Correction coquille ASI
[Bourse de collège] Montant multiplié par le nombre d'enfants scolarisés au collège
[Bourse collège] Suppression formule base ressources et utilisation de rfr
Utilise pensions_alimentaires_percues (Float) au lieu de alr (Int)