* Pandas deprecates the use of sort_index for sort_values * Numpy [deprecates use of np.float with issubdtype](https://github.com/numpy/numpy/pull/9505)
0.9.4
* Fix bug when initialising mono-entity (person-only) TaxBenefitSystem
0.9.3
* Fix difference pivot_table computation * Clarify code (use variable instead of column) and add some doctring
0.9.2
* Hack to custom default_config_files_diretory at CASD when using taxipp
0.9.0
* Migrate to openfisca-core v20 syntax * Fix a bug in `create_data_frame_by_entity`