- cram decks no longer pull cards from other cram decks, as tests like is:due
don't make sense on crammed decks
- cram decks now default to not overriding the original deck's steps
- remove obsolote dyn_failed sort order - have to fix this in upgrade
- search/limit/order properties have been merged into a list, in case we may
want to support multiple queries in the future (eg 10 cards from tag A, 20
cards from tag B)
- added a resched option to disable boosting/failure - not yet implemented
- added an unused flag to allow cards to persist in the cram deck after
graduation. implementing this will take some work and won't come in 2.0
- instead of is:filtereddeck, use deck:filtered
