Adding missing packages to requirements_demo.txt
Added missing datatypes
Fixed offers fixture
previous failed with
'sites/demo/fixtures/offers.json': Cannot set values on a
ManyToManyField which specifies an intermediary model.  Use
offer.RangeProduct's Manager instead.
applies_to_tax_exclusive_prices  has been removed
Bring templatetags inline with earlier renames
commits:
a8a140fa94baa13f778f9a1529de8d5c2b75e3f2
6341b576bf9fa18c4dc1c78aaa88e174826763f6
Added DATACASH_CURRENCY="GBP" to the settings.py
needed by django-oscar-datacash
Merge pull request #1086 from vmasutin/demo-fixes

demo target fixes