Remove 	a second level of columns from data trees.
Rename duplicate label.
plaf of paje
Add a test for retraites
Add noi to individus.
Correct columns attributions to their entities.
Improve tests on seniors.
Correction br_rmi
Plafonnement de l'ISF
Add labels
adaptation for testing ISF
Completion of labels in data
Draft of a cot. soc. preprocessor
Merge pull request #25 from LouisePaulDelvaux/master

PR relou
deal with accident
Replace ctx with state.
Working on cotsoc
Fixinf cotsoc for fonction publique

Still some uncertainities for contractuel of fonction publique
Add taille_entreprise

We might want to (re)create the "taille entreprise" option for the
parameters.
TODO: adapt the code structure for taxes d'apprentissage, formation
professionnelle, effort à la construction => then merge with the current
param.xml file
Add a test for retraites