Improve README.md for Windows users

README.md

@@ -27,9 +27,11 @@ Installation
 
 ### From a pre-built package
 
-Some Linux and OS X package managers include recent versions of LDC, so
-manually installing it might not be necessary. For several platforms,
-there are also stand-alone binary builds available at the
+##### Linux and OS X
+
+Some package managers include recent versions of LDC, so manually
+installing it might not be necessary. For several platforms, there
+are also stand-alone binary builds available at the
 [GitHub release page](https://github.com/ldc-developers/ldc/releases).
 
 | Distribution | Command               |
@@ -41,12 +43,28 @@ there are also stand-alone binary builds available at the
 | HomeBrew     | `brew install ldc`    |
 | Ubuntu       | `apt-get install ldc` |
 
+##### Windows
+
+The latest official releases can be downloaded from the
+[GitHub release page](https://github.com/ldc-developers/ldc/releases).
+
+For bleeding-edge users, we also provide the
+[latest successful continuous integration builds](https://github.com/ldc-developers/ldc/releases/tag/LDC-Win64-master).
+
+LDC for Windows relies on the Microsoft linker. So you'll either need
+[Visual Studio](https://www.visualstudio.com/en-us/downloads/download-visual-studio-vs.aspx)
+(2015 is greatly encouraged; 2013 works too if you build LDC yourself)
+with Visual C++, or the stand-alone
+[Visual C++ Build Tools](http://landinghub.visualstudio.com/visual-cpp-build-tools).
+For the latter to work, you'll need to create the environment variable `LDC_VSDIR`
+and set it to something like `C:\Program Files (x86)\Microsoft Visual Studio 14.0\`.
+
 ### Building from source
 
 In-depth material on building and installing LDC and the standard
-libraries, including experimental instructions for running LDC on
-Windows, is available on the project wiki at
-http://wiki.dlang.org/Building_LDC_from_source.
+libraries is available on the project wiki for
+[Linux and OS X](http://wiki.dlang.org/Building_LDC_from_source) and
+[Windows](http://wiki.dlang.org/Building_and_hacking_LDC_on_Windows_using_MSVC).
 
 If you have a working C++ build environment, CMake, a current LLVM (>= 3.5),
 and [libconfig](http://hyperrealm.com/libconfig/libconfig.html) available