2.15.3 (unstable):

Glib:
* FilterInputStream: Really wrap this.
* VolumeMonitor: Workaround a crash in gio due to the 
  eccentric use of the GType system to discover GVolumeMonitor 
  implementations. See gio bug #511814.
* Added Gio::Error exception.
* Added more method overloads without optional parameters, and 
  reordered more parameters to allow default values. 
  (Murray Cumming)
* giomm.h: Added includes.
  (Jonathan Jongsma)

* Note that there are some examples in the gtkmm-documentation module.