Make code for closing queues on worker threads symmetrical; make the closes FDs test more informative when errors are encountered
Fix that seems to avoid all leftover-FDs flakiness.
Merge branch 'master' into ntung-closes-fds-fix-2
Changes from code review (cross-platform compatibility)
Merge branch 'master' into ntung-closes-fds-fix-2
Use the real max FDs, add some comments
Merge pull request #15 from gatoatigrado/ntung-closes-fds-fix-2

pulling apart multiprocessing queue internals to fix the leftover FDs issue