new schema for staging imported data from external reports
removed obsolete primary key constraint
new public function copyrow: copies a row from a table and re-inserts it back to the same table with a new primary key value
new schema export: staging area for outgoing data, reports, etc
add function call to select the prior reported date for comparison. tidy up the commenting a bit
new function, returns boolean true if parameter can be cast as numeric
new function, returns date value matching old projected ship date
return projected ship date as 'N/A' when anchor bolts are not on the order'