2.27.4.1: (unstable):

Gio:
* DBus[Connection|Proxy]: Don't take extra reference on async creation.
* DBusConnection:
  - Add non-observable create method overloads.
  - Make the create methods.async get methods, static.
  - Added get_sync() methods.
  - Added send_message_with_reply_sync() methods.
  - Added signal_subscribe() and add_filter().
* DBusIntrospection: new_for_xml(): Rename to create_for_xml().
* DBusProxy:
  - Reorder the parameters so that "name" is second in methods.
  - Add a non-cancellable call_sync() method.
* Documentation: Add a DBus Doxygen group.
  (José Alburquerque)
  
Glib:
* Regex: Add a MatchInfo class and use it.
  (José Alburquerque) Bug #636911 (Alexander Shaduri)
* gmmproc: Remove m4 conversion files for gdk, gtk, atk, and pango.
  They are now in the derived projects, which should now include 
  convert_glibmm instead of, for instance, convert_gtkmm.
  Some modules will now need to add a line in their configure.ac so they
  can use the extra conversions from gtkmm. For instance, with
  gtksourceviewmm:
  MM_PKG_CONFIG_SUBST([GMMPROC_EXTRA_M4_DIR], [--variable=gmmprocm4dir gtkmm-3.0])
  (Murray Cumming)