* Redis Cluster: a distributed implementation of a subset of Redis.
    * New "embedded string" object encoding resulting in less cache
      misses. Big speed gain under certain work loads.
    * AOF child -> parent final data transmission to minimize latency due
      to "last write" during AOF rewrites.
    * Much improved LRU approximation algorithm for keys eviction.
    * WAIT command to block waiting for a write to be transmitted to
      the specified number of slaves.
    * MIGRATE connection caching. Much faster keys migraitons.
    * MIGARTE new options COPY and REPLACE.
    * CLIENT PAUSE command: stop processing client requests for a
      specified amount of time.
    * BITCOUNT performance improvements.
    * CONFIG SET accepts memory values in different units (for example
      you can use "CONFIG SET maxmemory 1gb").
    * Redis log format slightly changed reporting in each line the role of the
      instance (master/slave) or if it's a saving child log.
    * INCR performance improvements.