Some cleaning
Switching agem instead of age
Merge branch 'dev' of https://github.com/openfisca/openfisca into dev
cleaning columns.py and unifying model.py
reorganizing the structure of the folders of the table converters.
2nd commit of folder reorganization
Merge pull request #270 from jsantoul/dev

Cleaned the presta fam to ease reading
Merge branch 'dev' of https://github.com/openfisca/openfisca into dev
Debugger works for non aggregated menages