add manpage generation command
add manpage generation command

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