Comment 8 for bug 809016

Tt should be testable with:
$ SOFTWARE_CENTER_BUY_HOST=http://sc.staging.ubuntu.com ./software-center-gtk3

There are two default banners in the source and any additional banners will come from the exhibit system. This requires a downgrade of python-httplib2 to the natty version as otherwise it will fail with authentication issues because of the self signed certs.