new: GfarmQueue#after_check
minor fix
LAQ#deq: change steal factor from 0.02 to 0.05
change FinishQ size
print options, use TQ for non-affinty
use application.task_queue.after_check, modify for HALT_QUEUE_WHILE_SEARCH
add missing @cv.signal, add TQ#synchronize, trim noused, etc.