Ordered queue of grouped tasks. formerly in future.ML; added thread data; added group; more robust dequeue: change into running here; misc tuning;
Ordered queue of grouped tasks.
formerly in future.ML;
added thread data;
added group;
more robust dequeue: change into running here;
misc tuning;

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle