Add user and ou setting types to data seed values.

Add user and ou setting types to data seed values.

Add coust for opac.patron_temporary_list_warn to let an ou enable
warning users when adding records to a temporary book bag.

Add cust opac.temporary_list_no_warn to let patrons disable
the warning for themselves.

Add the opac.default_list usr_setting_type. This will be used to track a
user's default bookbag.

Add the upgrade script to create new coust and custs.

Insert coust (opac.patron.temporary_list_warn) and cust
(opac.temporary_list_no_warn, opac.default_list) into the respective
tables.

Signed-off-by: Jason Stephenson <jason@sigio.com>