update negotiation documentation
update negotiation documentation

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