Fix bug in offer manager with new datetimes
Mark offer condition/benefit summaries as safe

They can contain HTML these days.
Fix a few validation errors as part of offers dashboard
Move grouped_voucher_discounts off basket model

Moved onto the OfferApplications class, which is where it belongs
conceptually.
Add ranges fixture

Was getting pretty bored of creating one everytime I want to test the
offers dashboard.

Fixture is loaded as part of 'make sandbox|demo' targets.
Remove statics from demo site

Don't think these files should ever have been committed.
Bring settings files for sandbox and demo site in sync
Rework offer result classes

To make it easier to distinguish between the different offer application
types.
Add simple CSV fixture for testing ranges dashboard
Use HTML flash messages in ranges dashboard
Add fixture creds to README
Relabel the demo site
Add fixture for 3 different offer types
Rename demo offers module to be the same as sandbox

(So the fixture loads in both envs).
Minor improvements to checkout mark-up
Add new properties onto order model

This aid complicated discount displays.
Fix bug with AJAX basket update
Fix testing issue with model that should be a proxy
Document shipping repo
Alter the way shipping discounts are handled

They aren't treated specially any more.  They become part of the
'applications' collection rather than being attached to the basket.