adds streams example for review

examples/README.md

@@ -75,3 +75,41 @@ request.post('https://up.flickr.com/services/upload', {
   // assert.equal(typeof body, 'object')
 })
 ```
+
+# Streams
+
+## `POST` data
+
+Use Request as a Writable stream to easily `POST` Readable streams (like files, other HTTP requests, or otherwise).
+
+TL;DR: Pipe a Readable Stream onto Request via:
+
+```
+READABLE.pipe(request.post(URL));
+```
+
+A more detailed example:
+
+```js
+var fs = require('fs')
+  , path = require('path')
+  , http = require('http')
+  , request = require('request')
+  , TMP_FILE_PATH = path.join(path.sep, 'tmp', 'foo')
+;
+
+// write a temporary file:
+fs.writeFileSync(TMP_FILE_PATH, 'foo bar baz quk\n');
+
+http.createServer(function(req, res) {
+  console.log('the server is receiving data!\n');
+  req
+    .on('end', res.end.bind(res))
+    .pipe(process.stdout)
+  ;
+}).listen(3000).unref();
+
+fs.createReadStream(TMP_FILE_PATH)
+  .pipe(request.post('http://127.0.0.1:3000'))
+;
+```