2.47.6:

Glib:
* Add and uses Glib::c_str_or_nullptr().
  (Kjell Ahlstedt) Bug #755245
* Add some connect() overloads that move the sigc::slot.
  (Kjell Ahlstedt)
* Fix definition of VARIANT_TYPE_DICT_ENTRY to match header declaration
  (Aurelien Jacobs) Bug #761046
* Replace, via deprecation, ScopedPtr with make_unique_ptr_gfree().
  (Murray Cumming) Bug #760223
* SignalProxy: use variadic templates.
  (Marcin Kolny)
* ustring: Add move operators.
  (Kjell Ahlstedt) Bug #760282
*  Put deprecation ifdefs around aleady-deprecated GLIBMM_INITIALIZE_STRUCT.
  (Murray Cumming)
  
Gio:
* FileInfo::list_attributes(): Make name_space optional.
  (Murray Cumming)
* Icon: Add serialize(), deserialize() and documentation of create().
  (Kjell Ahlstedt)
* PropertyBase: Make custom properties more flexible
  (Kjell Ahlstedt) Bug #731484.
* SocketConnectable: Add to_string().
  (Kjell Ahlstedt)

Gio::DBus::
* Connection: Pass an empty bus name as nullptr.

gmmproc:
* Fix errthrow in _WRAP_VFUNC
  (Kjell Ahlstedt) Bug #762437
* Add NULL option to _WRAP_METHOD
  (Kjell Ahlstedt)
* h2def.py: Accept parameter names beginning with const.
  (Kjell Ahlstedt)

Build:
* Use some more minor C++11 features.
  (Murray Cumming)
* Threads example: Fix build on Visual Studio
  (Chun-wei Fan) Bug #760612
* glibmmconfig.h.in: Fix Visual Studio 2013 builds.
  (Chun-wei Fan) Bug #760612
* Glib::ustring: fix -Wmisleading-indentation gcc 6 warning in public header.
  (Aurelien Jacobs) Bug #760641.

Other:
* Reformat our hand-written C++ code with clang-format.
  (Murray Cumming)