node replacement working, woo!

gistfile1.txt

Staged changes:
(join) 'dev2@127.0.0.1'
(replace) 'dev3@127.0.0.1' -> 'dev2@127.0.0.1'

Member status after changes:
================================= Membership ==================================
Status     Ring    Pending    Node
-------------------------------------------------------------------------------
leaving    32.8%      0.0%    'dev3@127.0.0.1'
valid      34.4%     34.4%    'dev1@127.0.0.1'
valid       0.0%     32.8%    'dev2@127.0.0.1'
valid      32.8%     32.8%    'dev4@127.0.0.1'
-------------------------------------------------------------------------------
Valid:3 / Leaving:1 / Exiting:0 / Joining:0 / Down:0

WARNING: Not all replicas will be on distinct nodes

Transfers resulting from cluster changes: 21
  21 transfers from 'dev3@127.0.0.1' to 'dev2@127.0.0.1'