Debug toolbar 1.2 has some more usable panels, and less trouble with
jQuery interactions. It also is the first version to be compatible with
Django 1.7, which we'll support in the upcoming Oscar release.

django-compressor 1.4 has finally been released and supports Python 3
and comes with lots of other goodies.

sorl-thumbnail seems to be barely maintained anymore. I don't dare
switch to the beta version for Python 2. There's a few critical issues
reported on their issue tracker atm:
https://github.com/mariocesar/sorl-thumbnail/issues?labels=critical&page=1&state=open

django-nose-querycount is not Python 3 compatible and has been moved.

As requested in #1306

Be clear that we only support Python 2.

* Django version range has been bumped to a minimum of 1.4.9 because
  that's the latest security release
* Pillow has been bumped to a new max of 2.5 because Pillow 2.3.1 fixes
  a security issue
* treebeard has been bumped from it's beta to the stable release.
* Babel has been given an upper limit because that's good practice. Purl
  is developed in-house and can be left without an upper limit, and one
  can assume that six won't break backwards compatibility.

sorl-thumbnail unreleased version trips when THUMBNAIL_DEBUG isn't set.
I've submitted a pull request to fix it.

Discussion around #1200 highlighted that we must be aware of differences
between the versions of six that Django ships and the one we use.

In general, the external version of six is the best choice for Oscar,
because it allows to depend on a specific version of six. The multiple
Django versions we support each come with different versions of six,
which makes it unattractive to depend on them.

When interfacing directly with Django, it should be decided on a
case-by-case basis if it's more appropriate to use Django's supplied
version of six or the external one.

In the case of the UppercaseCharField, Django clearly documents what
needs to be done to get it to work with both Python 2 and 3 in
https://docs.djangoproject.com/en/1.6/howto/custom-model-fields/#the-subfieldbase-metaclass
Those instructions are the same for all versions of Django we support.
Hence it's been decided that it's best to switch to Django's recommended
way of declaring the metaclass, and using Django's version of six for
it.

Django-haystack==2.0.0 breaks update_index.

python-modernize (https://github.com/mitsuhiko/python-modernize) is a
useful wrapper around 2to3 which comes with sane defaults.

The fixes below were generated by running

    python-modernize --compat-unicode -w .

and then fixing all lint errors.

Let's hope both of them release a new stable version in time for Oscar
0.7.

We were using a beta release. 5.9.2 is the latest stable releases and
only has no code changes over the previously used one.

It was a dependency as Oscar used to use memcached for caching
in the sandbox. Since then, we've switched to LocMemCache and forgot to
remove it as dependency.

This requires a more recent version of Whoosh for the sandbox too.

This allows us to use the six compatibility library.

Now supports Django 1.5. Adapted CategoryForm to use the new
movenodeform_factory to build it's Meta class.

As it add some super-handy method for manipulating URLs that uses lists
of query params.  These are used for manipulating Solr URLs.

They were getting quite long. They've been split up in several
subsections. Some of them are borrowing heavily from the Django docs.

They are only really required if you are developing Oscar's CSS files -
they are not a real dependency of Oscar.

Suggested in #449.

This uses the unidecode package to convert non-ASCII words to ASCII
equivalents.  We use a new slugify function to wrap this logic as we
will want to use it elsewhere.

See this StackOverflow thread for context:
http://stackoverflow.com/questions/702337/how-to-make-django-slugify-work-properly-with-unicode-strings/

Unidecode becomes a new dependency for Oscar.
https://pypi.python.org/pypi/Unidecode

Hat-tip to @avsazonov for suggesting this fix.

Hopefully this is useful and not annoying.

Without it, it is a malformed VCS url

The HEAD of django-haystack master is currently broken, which highlights
the dangers of linking to a moving target.

Fixes #479

Was reading the guide to python packaging:
http://www.scotttorborg.com/python-packaging/

This involves some changes to the template block structure to make it
easy to compress the correct files.

* A new block cdn_scripts has been introduced as CDN-loaded scripts
  can't be compressed.
* A new setting 'USE_LESS' controls whether to use the LESS-generated
  files or the compressed files (which will need to be generated
  manually as they aren't in source control).
* A fallback for jQuery UI is added
* The CSS block was renamed to be clearer
* The bootstrap CSS was brought out of the LESS file into the page.
  This makes it easier to compress.

Have dropped dependency and started using a rewritten version of the
django-sorting templatetag.  Changes:

* Simplified logic
* Stripped out unwanted functionality
* Added support for i18n (several pull requests have been open on the
  original library for this, and not merge for many months).

Fixes an issue in django-oscar-stores.  The bump is
backwards-compatible according to @andrewingram.

os.chdir does not like empty strings...