allowed multiple select in membership app
updated invoices for membership applications
added staff with perm decorator
added discounts to memberships
fixes
added wysiwyg in registration text field
fix error for undeclared fields
merged with master
merged with master, fix error for undeclared fields
Default discount_eligible to false.
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.