[glibmm] Created tag 2.56.1

[Kjell Ahlstedt <kjellahl src gnome org>]

The unsigned tag '2.56.1' was created.

Tagger: Kjell Ahlstedt <kjellahlstedt gmail com>
Date: 1540998762 +0100

    2.56.1

Changes since the last tag '2.56.0':

Chun-wei Fan (8):
      MSVC builds: Require Visual Studio 2015
      MSVC builds: Ensure we build variantdbusstring.cc
      builds: Rename MSVC_Net2015 as MSVC_NMake
      build: Split out automake-specific items from filelist.am's
      build: Add NMake Makefiles
      build: Remove Visual Studio 2015 projects
      Update build instructions in README.win32
      Update .gitignore

Clemens Lang (1):
      ustring: Fix wchar conversion on macOS with libc++

Daniel Boles (3):
      AsyncResult: Bin obsolete docs re: initing GThread
      SocketClient: Take copy in RefPtrs for signal args
      AsyncResult: Fix grammar error, <tt>ify enumerator

Kjell Ahlstedt (10):
      Glib::MainContext: g_main_context_wait() is deprecated
      Avoid compiler warnings from function pointer conversions
      Revert "Avoid compiler warnings from function pointer conversions"
      Avoid compiler warnings from function pointer conversions
      configure.ac: Require glib-2.0 >= 2.55.1
      Avoid compiler warnings from function pointer conversions
      tools/test_scripts/testheaders.sh: Fix a directory test
      Merge branch 'glibmm-2-56.nmake' into 'glibmm-2-56'
      Add tools/gen_scripts/generate_all.sh
      2.56.1