Revert "pivotaltracker: Use client.Stories.Iterate"
Revert "pivotaltracker: Use client.Stories.Iterate"

This reverts commit 00e2bdc1f7a7d03d9a26247ed22122c8103f22f8.

Fixed the issue in the PT library itself and aligned SF code to match the new
List() function signature.

Story-Id: SF-221
Change-Id: 1c876767c0

salsaflow/salsaflow,salsaflow/salsaflow