• Added support for performing multiple jobs concurrently with a single worker. (bpmedley, sri)
  
• Added is_finished and start methods to Minion::Job. (bpmedley, sri)
  
• Added -j option to worker command. (bpmedley, sri)
  
• Fixed concurrency bugs in Minion::Backend::File.
  
• Fixed bug in job command where timing information was not displayed correctly.