v1.0.1

Changes since 1.0.0

• Bug fix for #181: Shuffle peers on PeerList.Add to avoid biases in peer
  selection.
• Peers can now be removed using PeerList.Remove.
• Add ErrorHandlerFunc to create raw handlers that return errors.
• Retries try to avoid previously selected hosts, rather than just the
  host:port.
• Created an ArgReader interface (which is an alias for io.ReadCloser) for
  symmetry with ArgWriter.
• Add ArgReadable and ArgWritable interfaces for the common methods between
  calls and responses.
• Expose Thrift binary encoding methods (thrift.ReadStruct, thrift.WriteStruct,
  thrift.ReadHeaders, thrift.WriteHeaders) so callers can easily send Thrift
  payloads over the streaming interface.