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

removed old unused view module

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

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.

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

renamed tox env `rerecord` => `record`

typo in development docs

* add testing documentation ...

* add a sample mailman.cfg for testing

add env for fixture re-recording to tox.ini

reduced number of vcr cassette files used in current tests

modified vcrpy setting to use yaml instead of json; add more testing documentation (draft)

Some documentation cleanup; New testing section (draft)

Bump Copyright Years

- removed documentation build from repository ...

- removed an unused rst file
- removed some outdated development documentation

Merge trunk