bootstrap-wysihtml5 was too buggy.  I was trying to avoid TinyMCE but it ended up
being the easier to use.  I tried with CKEditor but it proved too
difficult to configure.

Fixes #757
Fixes #946
Fixes #945
Fixes #944

Previous names were ambiguous as to whether discounts were being
included or excluded.

This involves some quite involved changes to the internals of how offers
and organised.  A new boolean field has been added to the offer model to
indicate whether to apply to prices exclusive of tax.  This is used
within the offer methods to determine whether a basket meets a
condition, and how to apply the benefit if it does.

Fixes #925
Fixes #924

Conflicts:
	oscar/apps/dashboard/catalogue/views.py
	oscar/apps/dashboard/partners/views.py
	oscar/apps/dashboard/reviews/views.py
	oscar/templates/oscar/dashboard/catalogue/product_list.html
	oscar/templates/oscar/dashboard/orders/order_list.html
	oscar/templates/oscar/dashboard/pages/index.html
	oscar/templates/oscar/dashboard/ranges/range_list.html
	oscar/templates/oscar/dashboard/reports/partials/open_basket_report.html
	oscar/templates/oscar/dashboard/reports/partials/order_report.html
	oscar/templates/oscar/dashboard/reports/partials/submitted_basket_report.html
	oscar/templates/oscar/dashboard/reports/partials/user_report.html

Remove duplicate "Date joined" field

Fix issue with submit() method and a few other small issues.

Fixes #913

This will return in a stronger form for v0.7.

The start of a final push to get search ready for 0.6.

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

This fixes a bug where selecting "anonymous" checkout would think you
wanted to register first.

Fixes #872

Middleware incorrectly had the old API

Fixes #911

STATIC_URL incorrectly quoted in documentation

I noticed the error message as it was thrown in my failing tests for the
permission-based dashboard.

This is to support the US market where taxes are shown separately from
other prices. This change requires a custom template variable to be
used, show_tax_separately.

Template typo

The old Repository class wasn't thread safe as the method instances were
created at compile time.  Since the instance is configured by setting
the basket for each request, this poses thread safety issues as two
requests could share the same method instance (one of which would have
the wrong basket assigned).

This change fiddles with how the methods are handled, ensuring that they
are instanciated within the instance methods so that thread-safety
issues go away.

Shipping methods need a gentle rewrite for v0.7 to ensure they aren't
vulnerable to such issues.

This is useful in the US where taxes are treated separately from other
charges.

Use strategy to look-up prices and availability

Don't fallback to default apps when ImportError is raised

Fixes were required inthe basket, order, partner and wishlist apps.