Queue.__init__ supports job_class argument.
Worker.__init__ should accept custom job class.
rqworker script should accept "--job-class" parameter.
Merge pull request #357 from selwin/job-class

Make it easier to use custom job class
fix --worker-ttl command line arg

Make sure it's converted to an int, since the rest of the code expects it to be.  Without this patch, trying to use that argument gets you something like this:

(cogo)[dbonner@bonnervm18 syseng]$ rqworker --worker-ttl 86400
21:52:07 RQ worker started, version 0.4.6
Traceback (most recent call last):
  File "/opt/cogo/bin/rqworker", line 9, in <module>
    load_entry_point('rq==0.4.6', 'console_scripts', 'rqworker')()
  File "/home/dbonner/src/github/rq/rq/scripts/rqworker.py", line 102, in main
    w.work(burst=args.burst)
  File "/home/dbonner/src/github/rq/rq/worker.py", line 354, in work
    timeout = None if burst else max(1, self.default_worker_ttl - 60)
TypeError: unsupported operand type(s) for -: 'str' and 'int'
Merge pull request #359 from rascalking/patch-1

fix --worker-ttl command line arg