[glibmm] Update Visual Studio Info in README.win32

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

commit 6aa79aa9989a520a2196486df41b3f7dc81cf039
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Sep 9 17:35:58 2015 +0800

    Update Visual Studio Info in README.win32
    
    The information in there regarding Visual Studio builds needs to be
    up-to-date, especially as we dropped support for Visual Studio 2012 and
    earlier, so update the info.  It is no longer necessary, nor is it
    recommended, to use the /vd2 option with later Visual Studio versions, as
    it causes the code to be built incorrectly and causes crashes.

 README.win32 |   19 ++++++-------------
 1 files changed, 6 insertions(+), 13 deletions(-)
---
diff --git a/README.win32 b/README.win32
index 9fb2921..71d7285 100644
--- a/README.win32
+++ b/README.win32
@@ -2,7 +2,7 @@ Building glibmm on Win32
 ===========================
 
 Currently, both the mingw (native win32) gcc compiler and MS Visual
-Studio 2005 are supported. glibmm can be built with mingw32-gcc using
+Studio 2013 are supported. glibmm can be built with mingw32-gcc using
 the gnu autotools (automake, autoconf, libtool). As explicitly stated
 in the gtk+ for win32 distribution (http://www.gimp.org/win32/), the
 gcc compiler provided by the cygwin distribution should not be used to
@@ -44,20 +44,13 @@ make
 make check
 make install
 
-2. MS Visual Studio 2005
+2. MS Visual Studio 2013
 
-Open the glibmm.sln solution file in the MSVC_Net2003 directory. In
+Open the glibmm.sln solution file in the MSVC_Net2013 directory. In
 the Tools/Options panel, add the appropriate GTK+ include and lib
-directories to the Projects and Solutions/VC++ directories. Build the
-solution. 
-
-Important NOTE : to circumvent the C++ compiler bug described in this
-bugzilla entry (http://bugzilla.gnome.org/show_bug.cgi?id=158040), it
-is necessary to add '/vd2' to the list of compiler options when
-building and/or using glibmm with Visual Studio 2005. 
-
-glibmm-2.8 will probably not work correctly with Visual Studio 7.1 or
-below because of the aforementioned bug.
+directories to the Projects and Solutions/VC++ directories, if they
+are not in the locations specified by the property sheets, i.e.
+$(srcroot)\..\vs12\$(Platform). Build the solution.
 
 3. Glibmm methods and signals not available on win32