Ticket 49025 - Upgrade nunc-stans to 0.2.1
    
    Bug Description:  Nunc Stans 0.2.0 had a defect which prevented signal
    registration functioning correctly.
    
    Fix Description:  Upgrade to 0.2.1
    
    https://fedorahosted.org/389/ticket/49025
    
    Author: wibrown
    
    Review by: mreynolds (Thanks!)