Merge pull request #72 from bouvard/master

suite cases déclaration des revenus 2013
Fixing net_to_brut
Add a decomposition file for prestations.
Modifying decomposition
Temporarily comment TaxIPP tests.
Add a decomposition containing multiple decompositions.
Modifcation of decomp_contrib
Merge pull request #73 from benjello/master

Modifcation of decomp_contrib
Correct rate.
Test legislations between 2006 & 2015.
Add legislation parameter for "nb part associées au conjoint d'un couple marié ou pacsé" in "quotient familial".
Correction typo
Correction typos
transformation example
Rename method sum_by_roles to sum_by_entity.
Rework simulation initialization.
Merge pull request #74 from JulietteS/master

Correction typo
Typo

Remove blabla in alr
Continuing integration of Laurence modification
Add consumers to variables.