fix debug mode bug in pspy.py

set argparser action for -v argument to count
move get/post logic to Gofer, retry on RateLimit

factor out get/post logic to Gofer, eliminating redundant code in
DomainReportGofer and FileScanReportGofer subclasses.

incorporate looping to handle RateLimit timeouts gracefully.

fix pspy.py single-process mode to handle not found results