Recommend waifu2x-caffe or w2xc for windows users

README.md

@@ -27,6 +27,8 @@ TODO
 
 [Third-Party](https://github.com/nagadomi/waifu2x/wiki/Third-Party)
 
+If you are a windows user, I recommend you to use [waifu2x-caffe](https://github.com/lltcggie/waifu2x-caffe) or [waifu2x-conver-cpp](https://github.com/tanakamura/waifu2x-converter-cpp).
+
 ## Dependencies
 
 ### Hardware