Refactor forms, add real tabs.
Fix update_session.
Don't add legislation_url in API calls.
Log simulation data and errors together.
Do not log JSON decode exception.
Handle non-AJAX requests in post controller.
Remove commented code.
Add console fallback in JS.
Remove URL bust param.
Minimize form reload.
Restore change event.
Merge branch 'forms'

Conflicts:
	openfisca_web_ui/controllers/__init__.py
	openfisca_web_ui/controllers/forms.py
	openfisca_web_ui/conv/legislation_urls.py
	openfisca_web_ui/conv/simulations.py
	openfisca_web_ui/pages.py
Refactor scenarios converters.
Flake8 fixes.