Merging Ankush Sharma's fix so that mass subscription is available to list owner and superuser, not to list moderators.

Switched else to another except. This was causing a test failure in test_confirmation_link (postorius.tests.test_address_activation.TestAddressConfirmationProfile); all tests now pass.

The Mass Subscription option is a power of List owner not of List moderator.

Merging Ankush Sharma's fix for Bug #1428543

Merging Abhilash Raj's fix for Bug #1437866 (and a duplicate #1430682)

Merging Bhavesh Goyal's fix for Bug #1431474 (with one change to the mass subscribe access)

Merging Pavan Koli's fix for Bug #1436309

* Fallback from EMAIL_CONFIRMATION_FROM to DEFAULT_EMAIL_FROM ...

* Raise ImproperlyConfigured if both of them are not defined
* Remove whitespaces

require django<1.8 since 1.8 doesn't play well with django-browserid (yet!)

removed old unused view module

django_browserid init: use included JS script instead of making the method call in the page.

removed django_nose ...

added django1.8 test env to tox.ini

Fixed Invalid Email Acceptance in Mass Subscription

Fixed method decorators which caused Bug #1435062

Typos fixed

Fixed Bug #1431474 postorius user nav role fix

Fix manage.py mmclient command for non-IPython shells. Contributed by Ankush Sharma (LP: 1428169).

Mozilla Persona integration: switch from django-social-auto to django-browserid: Contributed by Abhilash Raj.

replace django-social-auth with django-browserid

Fixed #1428543.

Fixed the issue #1428169.

Added missing MANIFEST.in items (Given by Aurélien Bompard).

And also include text-based templates

Also include VCR records

Also include tox.ini and dev-requirements.txt

Include the testing directory in the sdist tarball

removed unnecessary installation instruction from dev docs

* added tox to dev dependencies ...

* removed duplicate dependency file
* dev docs text change

small text change in dev docs

dev docs: note added