2.47.92:

* Adapt to libsigc++-2.0 2.8:
  - using only the non-deprecated sigc::mem_fun() API.
  (Kjell Ahlstedt)
  - using std::ref instead of deprecated sigc::ref.
  (Murray Cumming)
  -  Correct bad uses of sigc::bind<1>.
  (Murray Cumming)


gmmproc:
* defs generation: Mark deprecated signals and properties as such in the
  generated .defs file.
* gmmproc: Check if signals and properties are deprecated appropriately
  (Kjell Ahlstedt)

Build:
* MSVC builds: Look for includes in include/gio-win32-2.0.
  (Chun-wei Fan)