VS 2015 support in src/tools/msvc

Hi all,

Microsoft provides a set of VMs that one can use for testing and
Windows 10 is in the set:
https://dev.windows.com/en-us/microsoft-edge/tools/vms/windows/
I have grabbed one and installed the community version of Visual
Studio 2015 so I think that I am going to be able to compile Postgres
with VS2015 with a bit of black magic.

My goal is double:
1) As far as things have been discussed, VS2015 is making difficult
the compilation of Postgres, particularly for locales. So I'd like to
see what are the problems behind that and see if we can patch it
properly. This would facilitate the integration of cmake as well for
Windows.
2) src/tools/msvc stuff has support only up to VS2013. I think that it
would be nice to bump that a bit and get something for 9.5~.

So, would there be interest for a patch on the perl scripts in
src/tools/msvc or are they considered a lost cause? Having a look at
the failures could be done with the cmake work, but it seems a bit
premature to me to look at that for the moment, and having support for
VS2015 with 9.5 (support for new versions of VS won a backpatch the
last couple of years) would be a good thing I think.

Thoughts?
--
Michael