Update README for v4.0.1
Update README for v4.0.1

rightscale/rsc,lopaka/rsc,rgeyer/rsc,rgeyer/rsc,lopaka/rsc,rightscale/rsc,lopaka/rsc,rightscale/rsc,rightscale/rsc,lopaka/rsc,lopaka/rsc,rgeyer/rsc,rgeyer/rsc,rgeyer/rsc,rightscale/rsc