replace README example with embed from examples dir

Author: jonathanmorley

README.md

@@ -4,26 +4,7 @@ Instrument your application with [tracing](https://github.com/tokio-rs/tracing)
 and get tree-structured summaries of your application activity with timing
 information on the console:
 
-<pre> 
- <b>server</b>{host=&quot;localhost&quot;, port=8080<b>}</b>
-    0ms <b> INFO</b> starting
-    300ms <b> INFO</b> listening
-    <b>conn</b>{peer_addr=&quot;82.9.9.9&quot;, port=42381<b>}</b>
-      0ms <b>DEBUG</b> connected
-      300ms <b>DEBUG</b> message received, length=2
-    <b>conn</b>{peer_addr=&quot;8.8.8.8&quot;, port=18230<b>}</b>
-      300ms <b>DEBUG</b> connected
-    <b>conn</b>{peer_addr=&quot;82.9.9.9&quot;, port=42381<b>}</b>
-      600ms <b> WARN</b> weak encryption requested, algo=&quot;xor&quot;
-      901ms <b>DEBUG</b> response sent, length=8
-      901ms <b>DEBUG</b> disconnected
-    <b>conn</b>{peer_addr=&quot;8.8.8.8&quot;, port=18230<b>}</b>
-      600ms <b>DEBUG</b> message received, length=5
-      901ms <b>DEBUG</b> response sent, length=8
-      901ms <b>DEBUG</b> disconnected
-    1502ms <b> WARN</b> internal error
-    1502ms <b> INFO</b> exit
-</pre>
+https://github.com/davidbarsky/tracing-tree/blob/483cc0a118c3170f4246d6fa4a9f018a00d8f0a9/examples/quiet.stdout#L1-L28
 
 (Format inspired by [slog-term](https://github.com/slog-rs/slog#terminal-output-example))