2.77.0 (unstable):

Glib, Gio:
* Use callback functions with C linkage
  (Kjell Ahlstedt) Issue #1 (Murray Cumming)

Glib:
* Add create_variant()
  (Kjell Ahlstedt) Issue #109 (ilya-fedin)
* Add VariantBase::get_dynamic()
  (Kjell Ahlstedt) Issue #110 (ilya-fedin)
* Variant: Provide Variant<long long> whenever possible
  (Kjell Ahlstedt) Issue #111 (ilya-fedin)
* VariantContainerBase: Add a const version of get_child()
  and deprecate the non-const version
  (Kjell Ahlstedt) Issue #112 (ilya-fedin)
* Add DBusHandle and Variant<DBusHandle>
  (Kjell Ahlstedt) Issue #113 (ilya-fedin)
* ustring: Add truncate_middle()
  (Kjell Ahlstedt)

Gio:
* Add Subprocess and SubprocessLauncher
  (Kjell Ahlstedt) Issue #106 (ilya-fedin)
* Resolver: Add set/get/property_timeout()
  (Kjell Ahlstedt)

Documentation:
* Gio::File: Fix various spelling errors
  (Daniel Boles)
* Remove AUTHORS and README.SUN; add info to README.md
  (Kjell Ahlstedt) Issue gtkmm#140

gmmproc:
* Generate callback functions with C linkage
  (Kjell Ahlstedt) Issue #1 (Murray Cumming)

Examples:
* Add subprocess example
  (Kjell Ahlstedt) Issue #106 (ilya-fedin)

Tests:
* Giomm tests: Test for /etc/passwd instead of /etc/fstab
  (Jeremy Bicha) Merge request !60

Build:
* Require glib-2.0 >= 2.77.0
* Autotools build: Don't include config.h in ustring.cc
  (Kjell Ahlstedt)