main: add header
Merge pull request #1373 from jonboulle/header

main: add header
etcdserver: add member endpoint to peerurl
etcdserver: sort Members() in Cluster
Merge pull request #1375 from jonboulle/sort

etcdserver: sort Members() in Cluster
Merge pull request #1374 from xiangli-cmu/cluster_on_peerurl

etcdserver: add member endpoint to peerurl
main: fix proxy initialization and setupCluster