Server and client app demonstrating [Tornado]'s support of various 
HTTP methods.
Uses tornado.httpclient.AsyncHTTPClient.
One of the older demos.
Complexity: ★☆☆☆☆
Requirements
------------
Python (2 or 3), [Tornado], browser. Launch both server.py and 
client.py.
Effects
-------
- Visiting one of the urls defined in client.py (`/get`, `/post`, etc) will 
  fetch and display response from server.py app.
- Even though `HEAD` handler in server.py answers with some data, it never 
  reaches the other end.
[Tornado]: http://www.tornadoweb.org/