NZBGet 13 includes more status information

nzb['Status'] returns total (SUCESS/ALL) status and also failed status in V13+
This is particularly important when using fake detector scripts or stopping download due to health checks etc.
http://nzbget.net/RPC_API_reference#Method_.22history.22
https://couchpota.to/forum/viewtopic.php?f=5&t=4644
Merge pull request #4249 from clinton-hall/patch-1

NZBGet 13 includes more status information