Improve CSV parsing

After CSV finaly documented https://forums.aws.amazon.com/thread.jspa?threadID=141807
implement parser relying on documentation only. it must be slower than previous. but should
work even if amazon extend inventory fields in the future.
CSV - tiny code refactoring
CSV - disable space trim in fields. it's not documented.
Merge branch 'csv_improve' into development
Y2038 problem - different fix

use timegm_nocheck if year is out of range (+some manual rough check)