README.txt in whirlwind-0.1.5 vs README.txt in whirlwind-0.1.6

- old
+ new

@@ -66,9 +66,11 @@
   * sudo apt-get install imagemagick libgraphicsmagick1-dev libmagic1 libmagickcore-dev libmagickwand-dev
   * sudo apt-get install rmagick
   * sudo gem install whirlwind
 
 * Windows
+  * Install DevKit: 
+    https://github.com/oneclick/rubyinstaller/wiki/development-kit
   * gem install win32screenshot
   * gem install whirlwind
 
 * OSX
   * Install ImageMagick and development headers