Update README with latest ringChanged and membershipChanged event details
Update README with latest ringChanged and membershipChanged event details

uber-node/ringpop-node,uber/ringpop-node,hj3938/ringpop,esatterwhite/skyring,uber/ringpop,Collin-V/ringpop,tomasdiez/ringpop,hotrannam/ringpop,uber/ringpop-node,sasa233/ringpop,esatterwhite/skyring,uber-node/ringpop-node