Move column headers to their correct columns

They got shifted by accident in 1023401c
Update 1.0.1 release notes
Remove conditions and benefits

Remove the conditions Coverage, Value and Count and the benefits
AbsoluteDiscount, FixedPrice and Multibuy. Add NoneCondition for offers that
apply to all baskets.

Reason is that the correct semantics are unclear and we don't need them now
and I don't want to spend time fixing the tests for them. I'll refactor
offers without them.

Example for unclear semantics:
https://groups.google.com/forum/#!topic/django-oscar/vceEpy889O4
https://groups.google.com/forum/#!topic/django-oscar/XMuhEBLbv-U
Refactor offers

To track benefit application on a separate data structure instead of the
basket line. This uncouples the database-bound basket from the offer
calculations.
Support multiple benefits per line