fix HttpError imports

adapt exception handling to make it python3 compatible ...

also removes a print statement, that does not make any sense

Merge branch 'fix-html-issues' into 'master' ...

fix html issues

fix missing html closing tags
fix missing spaces between li and it's id
fix wrong "for" entries in labels

See merge request !16

Merge branch 'change-documentation-to-use-gitlab' into 'master' ...

Modify the documentation to point to GitLab

also fixes broken link to mailmanclient's documentation

See merge request !12

Fix missed occurrence of Bazaar and old link to documentation

fix html issues ...

fix missing html closing tags
fix missing spaces between li and it's id
fix wrong "for" entries in labels

modify links to use https instead of ssh ...

using ssh links assumes public keys have been added
and thus fails if users have not registered with GitLab

Modify the documentation to point to GitLab ...

also fixes broken link to mailmanclient's documentation

Fix bogus error messages in domain creation

Enable migrations as required by Django 1.8+ ...

Django 1.8+ won't let an app without migrations depend on django.contrib.auth
models, which is migrations-enabled. Django will create the legacy tables first
and there will be a database error.
This commit add basic migrations support in Postorius by following:
https://docs.djangoproject.com/en/1.8/topics/migrations/#adding-migrations-to-apps

Profile page: removed unused rows

Updated news file; version bump

removed unnecessary help text link

fix text-alignment of help text on settings pages

removed unused script files; added js-detection

Fix ErrorList import for django1.6 (Given by Aurélien Bompard)

Fix Django 1.6 compatibility

* Version bump. ...

* Updated news file.

updated news file.

Added subscription addresse switching (by Abhilash Raj). ...

Some modifications on summary view/html markup and wording.

* Added subscription moderation. ...

* Subscription attempts now show proper messages (subscribed/held for approval).
* Style changes on most forms.
* Removed some cruft from the forms module.
* Style changes on the summary page.
* Added list owner address to summary page.
* Added a note for moderators about non-advertised lists to the list index to avoid confusion.

rerecorded http test files

completed tests for list subscriptions: ...

- open list sub goes right through and adds a member.
    - moderated list sub is held for approval.

List subscription: Added proper feedback message, depending on immediate subscription or approval needed.

changed request identifier from request_id to token

rerecorded test files

added test for list subscriptions

Merging Ashish's code for convenient CSV export of the members list

Merge

Changed (and i18n'd) footnote on non-advertised mailing lists.