* campaigns
Coupons may now be associated with campaigns for better tracking
* segmented coupon codes
Coupon codes may now be segmented like "xxxx-xxxx-xx"
New settings (defaults):
* COUPONS_SEGMENTED_CODES (False)
* COUPONS_SEGMENT_LENGTH (4)
* COUPONS_SEGMENT_SEPARATOR ("-")
* prefixes for coupon codes
Coupons may now be auto prefixed upon creation
* expiration date for coupons
Coupons can now expire, see valid_until field
* migrations for south and django 1.7+ included
* django 1.8 now officially supported
* minor fixes