[1.8.x] Added headings to i18n template tags and filters.
[1.8.x] Added headings to i18n template tags and filters.

Backport of 9ca0961b8a4a6a5ff3ee903f71fd22e1936d004f from master

pquentin/django,pquentin/django,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,h4r5h1t/django-hauthy,pquentin/django