Setting a MembershipType guid if a guid is not set within the save method.
Using the string format method when returning MembershipDefault.__unicode__
Removing explicit None returned in MembershipDefault.demographics method.  Method returns None by default.
Removing debug-print statements in memberships/models.py
Using Profile.objects.first method when getting profile record in MembershipDefault.clear_member_id field.
Setting the MembershipDefault.user.is_member using more conventional method.
Removing unused Membership.clear_user_member_id instance method.
Profile.refresh_member_number now uses first management command method.