Add piketty_collection builder
Adding a piketty collection builder
Collection builder for base_IPP and ERFSIPP
Merge pull request #13 from MalkIPP/master

Collection builder for base_IPP and EIPP
Merge pull request #12 from adrienpacifico/master

Imputation loyer passing for 2006
Beginning of the adaptation of eipp survey of OF

- Read the data (done)
- Rename (done)
- some functionnal transformation of colums still todo:
- todo: handle the final drop of unused columns
Viewer for hdf5 database
Merge pull request #14 from MalkIPP/master

Build eipp survey data : step 1
Fix tabulation