Add survey_only attribute to prestations.
Don't return NaN numbers (dirty hack), because they are not valid JSON.
Correct default of Enum.
Add dated legislations validation.
Ignore .mo files.
Adding cerfa_field and info to Column
Add requirements.txt.
Merge pull request #3 from bouvard/master

Adding cerfa_field and info to Column
Improve requirements.
Change order of extra requirements.
Revert latest commit.
Add PyTables requirement.
Correct package name of PyTables.
Remove PyTables version.
Specify Git branch for Biryani.
Add "begin" and "end" dates to legislations to be able to apply legislations outside their given dates by extending them.
Add cerfa_field & info to columns JSON.
Add limits to scales values.
Remove useless variable.
Fix some typo