Factor out loadSSKURIs()
Synchronization fixes and refactoring.
More sync fixes.
Refactor all USK address handling into IndexURIs class.
Load the URIs as soon as we start merging to disk.
Factor out SpiderIndexUploader - move everything related to uploading Spider indexes to a separate class, shouldn't be in Main.
Factor out SpiderIndexURIs.
Add FCP API to get the eventual USK.
Better API
Initial edition is 0, so comment is now correct.