Revert "Add use __str__ with python_2_unicode_compatible for plugins too...

Add use __str__ with python_2_unicode_compatible for plugins too

Fixed problem with cleaning the username when the application is using a...

Fix multiple issues in the attachments plugin, especially for reusing attachments in other articles

Fix notification error in settings

Article subsciptions was missing a .count()

Conflicts:
	wiki/plugins/attachments/models.py

add more tests of custom managers and add support for django 1.5 and 1.6's patterns for empty querysets

python_2_unicode_compatible decorateur

Move future import to the top of the file

All from __future__ imports have to be at the top of the file.

Conflicts:
	wiki/plugins/haystack/views.py

Fix hashbang in testproject/manage.py

Fix issue #326

...and they probably never will. Assuming that 0.0.24 will support Python 3.3+.

Migrations reset on the rather messed up notifications app

Fix upload for python3 rebased

Previously it was failing with "TypeError: Unicode-objects must be encoded
before hashing" when taking the md5 of a Python3 str object.

Running Article.clear_cache() on deleting isn't enough to properly clear the
cache.  This is because get_cache_key() can return different values - so if
you 1) create an article 2) then modify it 3) then delete, the cache of
content after 1) is not cleared by Article.clear_cache() after 3).

Therefore, when saving, we also clear the instance cache. This is more
robust, and means we also don't have to explicitly delete Articles in test
tearDown.

This bug shows up particularly in tests, due to the increased possibility of
IDs being re-used.