Encourage to .disconnect() when done

Working-with-Updates.md

@@ -4,7 +4,7 @@ The library can run in four distinguishable modes:
 * With several worker threads that run your update handlers.
 * A mix of the above.
 
-Since this section is about updates, we'll describe the simplest way to work with them.
+Since this section is about updates, we'll describe the simplest way to work with them. Remember that you should *always* call `client.disconnect()` once you're done.
 
 ## Using multiple workers
 
@@ -35,6 +35,7 @@ def replier(update):
 
 client.add_update_handler(replier)
 input('Press enter to stop this!')
+client.disconnect()
 ```
 
 We only ask you one thing: don't keep this running for too long, or your contacts will go mad.
@@ -45,11 +46,16 @@ All the workers do is loop forever and poll updates from a queue that is filled
 
 ```python
 while True:
+    try:
         update = client.updates.poll()
         if not update:
             continue
 
         print('I received', update)
+    except KeyboardIterrupt:
+        break
+
+client.disconnect()
 ```
 
 Note that `poll` accepts a `timeout=` parameter, and it will return `None` if other thread got the update before you could or if the timeout expired, so it's important to check `if not update`.
@@ -88,5 +94,6 @@ client = TelegramClient('session', api_id, api_hash,
 
 client.connect()
 client.add_update_handler(callback)
-client.idle()
+client.idle()  # ends with Ctrl+C
+client.disconnect()
 ```