Let cleanup_ghosts accept conn argument
Convert rqworker to 'rq worker' subcommand
Use click's evvar to retrieve SENTRY_DSN environment value
Make pythonic
Make pythonic
Cleanup
Retrieve url from config file
Move redis url default value to connect function

So worker subcommand can retrieve redis url from config file if url
option value is None, otherwise url option value will never be None.
Cleanup
Fix interval type bug, it should be float
Update test_cli
Cleanup
Add testcase for rq worker command
Make pep8
Make flake8 happy :)
Merge branch 'master' of github.com:nvie/rq into cli-rq-worker
Use type instead of default to specify interval option type
Merge pull request #420 from zhangliyong/cli-rq-worker

Convert `rqworker` to `rq worker` subcommand