Merge branch 'release/0.9.4' into develop
version bump to 0.9.5a1.dev1
adds next entry in history
limit django-polymorphic version to 0.4.0, since 0.4.2 seems to break with django-mptt
updates testsuite to use django-1.3 compatible version of django_polymorphic. don't enforce old version for everybody.
Fix error raising in FILER_DEBUG mode

Re-raising the error modifies the traceback and makes it hard to debug.
Just calling raise in a except statement re-raises the error with
its full traceback, making it easier to debug.
Merge pull request #312 from fusionbox/fix-debug

Fix error raising in FILER_DEBUG mode
fixed migration for custom users
Removed code duplication between icon and thumbnail generation
Merge pull request #316 from kux/code_refactoring

Small refactoring: removed code duplication between icon and thumbnail generation
Fix issue of not being able to change the owner of a folder without changing it's name as well.
Small performance improvement when checking for duplicate folders.
Fixed issue with folder names that contain quotes and are being used in a directory table/list popup

If a folder contains a single quote and is being used in a folder directory/list popup
the generated onclick attribute for the insert link contains broken javascript:
onclick="opener.dismissRelatedFolderLookupPopup(window, 3, '/Foo's Bar/whatever'); return false;"

Added a new method that returnes a url quoted pretty logical path. This can be used for the onclick attributes.
Added missing import and a unit test for covering the quoting property
Added a unit test for checking folder owner changing and removed some unused imports
Use django.utils.http.urlquote as it also handles unicode characters
Remove the urlencode filter
Replaced django.template.defaultfilters.urlencode with django.utils.http.urlquote and removed unused import.
Merge pull request #319 from kux/folder_quoting

Fixed issue with folder names that contain quotes and are being used in a directory table/list popup
Merge pull request #317 from kux/develop

Can't change a folder's owner without changing it's name as well