Working on numerical inversion (WIP)
Still WIP on inversion
Finishing numerical inversions

Still problem for cho and rst because of csg_rempl
Add formula to compute "zone aide personnelle au logement" from postal code.
Remove Prestion (replaced by Column).
Improve suggestions.
Modfiying eligibility condition for ASI and ASPA
Change min. vieillesse for ASPA
Finish removing Prestation
Create real columns for birth and prenom.
Add test for APL.
Set default "activite" for children.
Merge branch 'master' of https://github.com/openfisca/openfisca-france