add stats to the contractor's downloader
add stats to the contractor's downloader

mnsl/Sia,NebulousLabs/Sia,mharkus/Sia,NebulousLabs/Sia,ericflo/Sia,mtlynch/Sia,ChrisSchinnerl/Sia,mnsl/Sia,MrStrong/Sia,mharkus/Sia,ericflo/Sia,ChrisSchinnerl/Sia,MrStrong/Sia,mtlynch/Sia