Refactor JS application loading via appconfig.
Fix name.
Fix case when session is None.
Adapt new appconfig to legislation pages.
Add 'situateur' chart

Conflicts:
	openfisca_web_ui/static/js/modules/helpers.js
	openfisca_web_ui/static/js/views/DistributionChartV.js
	openfisca_web_ui/static/js/views/LocatingChartV.js
	openfisca_web_ui/static/js/views/WaterfallChartV.js
	openfisca_web_ui/static/js/views/appV.js
Declare nvd3 path in require config.
Update legends.
Remove unnecessary accordion references.
Refactor "prenom" modification with x-editable.
Display "Se situer" chart by default.