* Added card name and set abbr. to error message if download failed.
* Switched from UUID to MageObjectReference to handle affected objects of continuous effects. Solvng problems with objects that changed (multiple times) zones while the effect lasts.
[SOK] Added Pure Intentions.
* Made a lot of changes to handling of continuous and triggered abilities. This should fix the problems with Mage Singletons like Flyinging / Intimidate / Reach not working. Fixed also #533 and some other problems with copy effects of cards like Clone that did not end if e.g. Clone left the battlefield.
* Added phase step name to the priority prompt text.