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

* Reworked internal testing ...

* Documentation update

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

added doc build dir to .bzrignore

- removed documentation build from repository ...

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- removed some outdated development documentation

- set minimum Django version to 1.5 in setup.py ...

- setup.py pip8 fixes

remove dpulicate fixtures dir

Merge trunk

* Added tox configuration and new test setup ...

* Modified some existing tests to not break when run independently from the standalone project.
* Added a test for the list metrics page.

Show held message details in a modal window. Contributed by Abhilash Raj (LP: 1004049).

Fix broken translation string on the login page. Contributed by Pranjal Yadav.

Fix small bug moderator/owner forms on list members page. Contributed by Pranjal Yadav (LP: 1308219).