Restore .errorlist styles
Initial move of the demos app.
Merge pull request #2558 from openjck/restore-errorlist-styles

Restore .errorlist styles
Refactor/rewrite imports, URL reverses and settings due to move of demos app.
Merge pull request #2564 from ubernostrum/move-demos-app

Move demos app
Merge branch 'master' into persona-allauth

Conflicts:
	kuma/demos/feeds.py
	kuma/demos/helpers.py
	kuma/demos/models.py
	kuma/demos/tests/test_views.py
	kuma/users/views.py
fix bug 1029071 - send translated welcome emails

use pofile to check for translated strings

tests for default, translated, and untranslated

add trans blocks to HTML email
use vendor w/ polib; update vendor docs
add locale.tar.gz for travis
cleanups from #2532
fix db/celery race condition