Converting baremes to taxscales
Simplify expression.
Rename TaxScale functions to be more Pythonic.
Correct initialization of quifam, quifoy & quimen arrays (re-add wrongly removed source code).
Remove wrong code.
Improve handling of age of persons in "familles" & "foyers_fiscaux".
Cleanup code.
Correct age detection.
Added complete name for ASI and ASPA achronyme
create some tests for rsa.
Work still in process (not made fully standard with nosetets).
Other tests will be aded soon.
File test_rsa.py have been a bit cleaned
Merge pull request #95 from adrienpacifico/master

Rsa test + one comment
Add missing attributes in JSON serialization of scenarios.
Correct variable name when computing age.
Correct variable name.
Deleate one false TODO, deleate blank line
Change label of birth column.
Use numeric IDs for new "familles", "foyer-fiscaux" & "ménages" instead of uuid.
Add flag to suggest method to ensure that scenario will not be modified in validation mode.
Remove flag preserve_scenario from suggest method.