• Removed TTIN, TTOU and USR1 signals from worker command.
  
• Changed return value of start method in Minion::Job.
  
• Added support for worker remote control commands.
  
• Added commands attribute to Minion::Worker.
  
• Added add_command and process_commands methods to Minion::Worker.
  
• Added pid and stop methods to Minion::Job.
  
• Added broadcast and receive methods to Minion::Backend::Pg.
  
• Added -b option to job command.
  
• Improved worker command with support for jobs and stop remote control commands.