Use legislation accessors (instead of _P) to irpp functions.
Try to use PPAs for Pandas & SciPY in Travis-CI.
Don't ask for confirmation when adding PPA to Travis-CI virtual server.
Typo.
Rename Ubuntu Package for Pandas to python-pandas.
Remove install of xlrd package in Travis-CI (already installed by Pandas).
Remove Pandas from required packages (needed only for tests).
Add pip install of xlrd.
Upgrade pip version of xlrd.
Merge branch 'master' of https://github.com/openfisca/openfisca-france