CSS for the SP Portal
    
    This controls the SP tiles and auto-generates an
    image for an SP that doesn't have one based on
    the first letter of its name.
    
    https://fedorahosted.org/ipsilon/ticket/148
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-by: Patrick Uiterwijk <puiterwijk@redhat.com>