Adds missing import of QueueException
Adds missing import of QueueException

deathowl/huey,charleswhchan/huey,happybits/huey,pombredanne/huey,happybits/huey,oz123/huey,coleifer/huey,angvp/huey,charleswhchan/huey,antoviaque/huey,rsalmaso/huey,angvp/huey