Open the 1.9 branch
Merge branch 'master' into next

* master:
  This line should NOT have been removed
Remove support for legacy extensions
Remove the automatic addition of unknown fields to the page admin fieldset
Merge branch 'master' into next

* master:
  FeinCMS v1.8.1
  Fix flake8 problems

Conflicts:
	feincms/__init__.py
	feincms/extensions.py
Remove the deprecated _feincms_extensions attribute
Merge branch 'master' into next

* master:
  FeinCMS v1.8.2
  TranslatedObjectMixin should be treated with @python_2_unicode_compatible

Conflicts:
	feincms/__init__.py
Merge branch 'master' into next

* master:
  FeinCMS v1.8.3
  Do not only include the page admin templates in the archive, also install them
  Make {% feincms_breadcrumbs %} isinstance check BasePage not Page. See #487

Conflicts:
	feincms/__init__.py
Merge branch 'master' into next

* master:
  Build universal wheels
  Add Python version trove classifiers
Merge branch 'master' into next

* master:
  Fix occurrences of E126
  flake8-clean the code a bit
  Fix #490: Item editor buttons for media files fixed for Django 1.6
Merge branch 'master' into next

* master:
  Try again
  FeinCMS v1.8.4

Conflicts:
	feincms/__init__.py
Update jQuery and jQuery UI

Refs #489.
Add a note to the release notes concerning the update of jQuery (UI)
Merge commit 'b3b2eb96a20c0c332267cab8d43535f6be9171b4' into next
Merge branch 'next' of github.com:feincms/feincms into next
Extract tab construction to own function, so one can reuse it for other tabs.
Merge branch 'next' into tabbed_options2
Morph extensions options into a tab-bar.
Merge branch 'tabbed_options2' into next
Add a too-small-note to the release notes about the tabbed extension interface