Add orderbook link into root resource
Add orderbook link into root resource

masonforest/go-horizon,nullstyle/go-horizon,masonforest/horizon,nullstyle/go-horizon,stellar/horizon,FredericHeem/go-horizon,nullstyle/go-horizon,FredericHeem/go-horizon,irisli/horizon,lackac/horizon,irisli/horizon,lackac/horizon,stellar/horizon,stellar/horizon,masonforest/go-horizon,masonforest/horizon,lackac/horizon,FredericHeem/go-horizon,irisli/horizon,masonforest/horizon,masonforest/go-horizon