Needed ability to import cust_pkgs with order_date set in the past

I passed this change on to Jayce and he suggested I pass it along myself.  Primary change is to honor an 'import' flag to not set order_date to now.  Additionally honored 'import' flag on some other sections where it seemed appropriate (don't adjust start date and don't send welcome letter).

Initially I was going to use a global $import, similar to the var in cust_main but the combination of global and passed args seemed awkward so I switched to passing it in options.