Example code in ReadMe won't run.

The Readme contains some example code.

One example demonstrates that servers are also clients:

* It imports `time.sleep()` but never uses it. Meanwhile, it uses `time.time()` without importing it.
* It has a variable called `cont` which is never defined.
* It does a busy wait, which is not demonstrating a good way to use the API.
* It keeps appending True to a list (Why not just count?), but never popping it.
* ping takes parameters, but it isn't clear what they represent.
* pong doesn't use the *parameter. Rename it `_`.

One example demonstrates that async servers.
* It imports OSCThreadServer but uses OSCAsyncServer

One example demonstrates how Unicode is used.

* Uses OSCThreadServer without importing.
* Uses send_message() without the expected `osc.` prefix.

Start in the README and run each of the reported Python examples. Check the server/client, async-server, and Unicode examples against their imports, variables, parameters, and API calls; done means the examples run without errors and clearly demonstrate the behavior described.

Written by the indexing model from the issue text.