Ensure that sum_by_entity doesn't generate an array of booleans and that any_by_roles generates an array of booleans.
Move statshelpers to openfisca-(country)-data projects.
By defaut, in debug mode, log only formula calls with non-default parameters. Add debug_all mode.
Add support for formulas traceback.
Add url attribute to columns.
New functions to transform a non-Numpy Python value to JSON.
Swithching from baremes to taxscales
Adding missing file
Deleting baremes
Remove a forgotten print command
Add non-computed holders to traceback.
Rename TaxScale functions to be more Pythonic.
Don't erase existing step, when updating it.
Correct default for StrCol.
Fix constant_amount taxscale
Fix constant_amount_option
Convert default of enumerations as strings instead of integers.
Fail when an EnumCol has no enum.
Change set_dependencies parameters to not depend of a tax-benefit system anymore.
Accept strings for boolean columns.