continued documentation and cleanup

api/client.go

bindings/interfaces.go

go.mod

go.sum

network/follow.go

network/message/garbled.go

network/message/handler.go

network/message/manager.go

network/message/sendCmix.go

network/rounds/check.go

network/rounds/historical.go

network/rounds/processingRounds.go

network/rounds/processingRounds_test.go

network/rounds/retrieve.go