harvester bugfix: find href when a element is found

Signed-off-by: zeljko <zeljko@zwr.fi>
harvester debugging, duts, origin url

Signed-off-by: zeljko <zeljko@zwr.fi>
bestseller crowler definition

Signed-off-by: zeljko <zeljko@zwr.fi>
harvester: use xpath

Signed-off-by: zeljko <zeljko@zwr.fi>