allowed multiple select in membership app
updated invoices for membership applications
fix error for undeclared fields
merged with master
Merge branch 'refs/heads/master' into 443_multi_select_memberships

Conflicts:
	tendenci/addons/memberships/views.py
redirect pages with swfuploader to nonssl
Add a field ma (foreign key to MembershipApp) to the MembershipDefault model.
Data migration to assign the default membership app.
Use slug for memb. app preview.
Use slug for membership add and update the link accordingly in many places.
Change field name ma to app.
Membership app change view added the view on site link.
Assign app to membership on add.
Add alert message on membership app preview.
Include the memb_app field on corp. app admin interface.
Corp app change_form update for more links.
Include the expired in the status check for can_renew function.
Update the logic of end_dt in get_renewal_period_dt.
Update the renewal links on profile view.
Merge branch 'refs/heads/master' into membership_multi_apps