Merge pull request #413 from FabienPean/patch-1

Add details on Windows installation

CHANGES

@@ -1,5 +1,8 @@
 arpack-ng - 3.9.1
 
+[ Fabien Péan ]
+ * README: Add details on Windows installation.
+
 [ Franck Houssen ]
  * [BUG FIX] Fix install: headers in /path/to/local/include/arpack
  * arpackmm: allow for using LA/SA magnitudes.

README.md

@@ -282,7 +282,7 @@ $ LIBS="-framework Accelerate" FFLAGS="-ff2c -fno-second-underscore" FCFLAGS="-f
 
 ### Windows support
 
-`arpack-ng` runs on windows using `mingw64`.
+`arpack-ng` can be installed on Windows as a MinGW-w64 package via various distribution, for example through [MSYS2](https://packages.msys2.org/package/mingw-w64-x86_64-arpack) with `pacman -S mingw-w64-x86_64-arpack`. It can also be built and installed through [vcpkg](https://github.com/microsoft/vcpkg) with `vcpkg install arpack-ng`.
 
 ## Using arpack-ng from your own codebase