New low-level streaming protobuf Riak client

[mikepb]

I was revisiting Riak's Protocol Buffer API and decided to use it to learn Node.JS's streaming API. I ended up using dcodeIO/ProtoBuf.js to write a nice stream-based "socket" for Riak:

https://github.com/mikepb/ripe-protobuf

var RipeSocket = require('ripe-protobuf');
var socket = new Ripe();

socket.write({
  type: 'RpbGetServerInfoReq'
});

socket.once('data', function (data) {
  console.log(data);
  // { type: 'RpbGetServerInfoResp',
  //   result: {
  //     node: 'riak@127.0.0.1',
  //     server_version: '2.0.0beta1' } }
});

This could be useful for #196 (this is a stream), #199 (uses Riak 2.0 .proto descriptions), #204 (underlying socket has keep-alive enabled), #210 (uses no native modules).

Would this library be useful to anyone?