Update changelog.

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+* **0.18.2.2**: 20160809
+  I'm still getting the hang of making the new serial handling code work
+  properly, sorry. This release is a minor change to the serial port
+  initialisation and teardown, ensuring the port is created properly every
+  time the flight scene loads, and is torn down properly without memory leaks
+  when the flight scene exits. This should make it more stable across
+  multiple scene changes.
 * **0.18.2.1**: 20160721
   * Move inbound packet processing out of worker back in to main thread.
   * Serial worker thread uses while loop instead of nested calls,