Allow creating just values & binds

[petdance]

Sometimes you just want some values and binds, for cases like this:

    my $unshipped_sth = TW::DBI->prepare( <<"SQL" );
BEGIN
    $TEST_PACKAGE.createUnshippedTitlesList(
        :custid,
        :oam_id,
        :listid,
        :listname,
        :listdesc,
        :price_type,
        :order_exquoteid,
        :user_exquoteid,
        :cart_mode
    );
END;
SQL
            sqldo_exec_ok($unshipped_sth, {
                ':custid' => $user->custid,
                ':oam_id' => $oam_id,
                ':listid' => $listid,
                ':listname' => 'listutils.t',
                ':listdesc' => 'description',
                ':price_type' => $price_type,
                ':order_exquoteid' => $exquoteid,
                ':user_exquoteid'  => $exquoteid,
                ':cart_mode' => $user->cart_mode,
            });

We don't want to build the entire SQL statement because it's a proc and function call, but bulding up the names and the binds out of a hash would be nice.