Add vcpkg installation instructions

README.rst

@@ -229,6 +229,20 @@ used:
     $ ./configure
     $ make
 
+Building nghttp2 - Using vcpkg
+------------------------------
+
+You can download and install nghttp2 using the `vcpkg <https://github.com/Microsoft/vcpkg>`_ dependency manager::
+
+    $ git clone https://github.com/Microsoft/vcpkg.git
+    $ cd vcpkg
+    $ ./bootstrap-vcpkg.sh
+    $ ./vcpkg integrate install
+    $ ./vcpkg install nghttp2
+
+The nghttp2 port in vcpkg is kept up to date by Microsoft team members and community contributors.
+If the version is out of date, please `create an issue or pull request <https://github.com/Microsoft/vcpkg>`_ on the vcpkg repository.
+
 Notes for building on Windows (MSVC)
 ------------------------------------