Inlined util/slice.
Inlined util/redis.
Test ZugZug constructor.
Test zugzug.getJob.
Test zugzug.moveJob.
Test zugzug.queue.
Job ID should always be a string.
Test zugzug.resetJob.
Test zugzug.startJob.
Test zugzug.useDatabase.
Added coverage.
Test Queue constructor.
Test Job constructor.
Tidied up exclude test.
Test job.delete.
Test queue.next. Added timeout.
Test queue.createJob. Added optional args.
Test queue.delete.
Test job.save.