Correct ancient line & other things in Readme
ReplaceNodeCLI command

The checkin adds a command to replace node. It takes in the old cluster
URL and node id to be replaced and the new cluster URL. It modifies the
old cluster to remove the old node and adds the new node in place. It
automatically restores the data from the other nodes in the old cluster
to the new node.
Merge branch 'hostswap'
Voldemort release 1.9.3

Release voldemort version 1.9.3
Fix proximity list on 2 zone config

Fix the proximity list on 2 zone config