[gtkmm] (7 commits) Non-fast-forward update to branch gtkmm-3-24.nmake

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'gtkmm-3-24.nmake' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  bce12ce... build: Rename MSVC_Net2013 to MSVC_NMake
  d2de7bc... gendef: Skip CRT symbols that are implemented inline
  5b387e3... build: Remove GNU Makeisms from filelist.am's
  2991869... build: Add NMake Makefiles for Visual Studio builds
  710ffbe... build: Remove Visual Studio 2013 projects

Commits added to the branch:

  5a00f60... Document Gtk::CSsProviderError as @newin{3,16} (*)
  1cfa2ac... Merge branch 'document-CssProviderError-new-in-3-16' into ' (*)
  88a715a... build: Rename MSVC_Net2013 to MSVC_NMake
  27b8c81... gendef: Skip CRT symbols that are implemented inline
  b17c414... build: Remove GNU Makeisms from filelist.am's
  2331345... build: Add NMake Makefiles for Visual Studio builds
  a359427... build: Remove Visual Studio 2013 projects

(*) This commit already existed in another branch; no separate mail sent