2.27.91 (unstable):

Gio:
* BufferedInputStream, BufferedOutputStream: Fix create_sized().
       (Murray Cumming) Bug #638616 (Michael Edwards)
* DBus: Use std::string for addresses since they could be a file path.
 Use std::string instead of Glib::ustring for address parameters just to avoid
 possible errors since DBus address could be a filename path as the "Addresses"
       section of the DBus introduction seems to imply:
       http://www.freedesktop.org/wiki/IntroductionToDBus.
* DBus: Use std::string instead of Glib::ustring for guid's since std::string's
 API is probably adequate enough for their use.
 (José Alburquerque)
* DBusConnection:
 - call*() methods: Re-order parameters.
 - Callbacks: Check for NULL GError** parameters and throw exceptions to the
 caller.
 - Add [register|unregister]_subtree() methods.
 - Fix crashes caused by inappropriate use of reinterpret_cast<>.
 (José Alburquerque) Bug #637587 (Yannick Guesnet)
* DBusConnectionInvocation: reference-counting fixes.
 (Murray Cumming)
* DBusIntrospection: Fix some reference counting.
* DBusServer:
 - Added create() methods.
 - CCorrect the type of the "active" property.
* SocketService, ThreadedSocketService: Correct ref-counting for signals.
* Improvements to the DBus examples.
 (José Alburquerque)

Tools:
* gmmproc: Warn about unwrapped properties.
 (Krzesimir Nowak)
* Added defs_fixer.pl, which fixes some generated .defs by applying a specified
 override file. This should be easier than using a patch.
 (Krzesimir Nowak)