2.2.9:

* trackable: Avoid calling the same callback function twice, fixing some
	memory corruption.
	(Kjell Ahlstedt) Bug #589202
* Minor documentation corrections.
  (David King)
* Fix the build with GCC 4.6
	(Kalev Lember)
* Windows build fixes for MSVC++ .Net 2005 and 2010
  (Armin Burgmeier)