* 2.2.1
    * Changed archive name to redis-py-VERSION.tar.gz to not conflict
      with the Redis server archive.
* 2.2.0
    * Implemented SLAVEOF
    * Implemented CONFIG as config_get and config_set
    * Implemented GETBIT/SETBIT
    * Implemented BRPOPLPUSH
    * Implemented STRLEN
    * Implemented PERSIST
    * Implemented SETRANGE
