[pangomm] (6 commits) Non-fast-forward update to branch master.nmake

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

The branch 'master.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:

  52a8cd2... build: Rename MSVC_Net2017 to MSVC_NMake
  f1ac4aa... build: Split out GNU-specific stuff from filelist.am
  f7f1100... build: Add NMake Makefiles to build pangomm
  18a79e1... build: Remove Visual Studio 2017 projects

Commits added to the branch:

  7d05089... Fix compilation of each header file (*)
  6db6b30... Attribute: Add several create_attr_*() methods (*)
  a7ddaa4... build: Rename MSVC_Net2017 to MSVC_NMake
  00f06c2... build: Split out GNU-specific stuff from filelist.am
  3c8a7f9... build: Add NMake Makefiles to build pangomm
  abf4a8f... build: Remove Visual Studio 2017 projects

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