fork_changes: link to git compare instead

There are too many changes to list them all, so we link to a git compare page.

FORK_CHANGES.md

@@ -13,14 +13,6 @@
   - Added Windows build guide
 
 ## 3. Fork by [DeadSix27](https://github.com/DeadSix27/waifu2x-converter-cpp) (this fork)
-  - Improved build guide [BUILDING.md](BUILDING.md)
-  - Added support for Ubuntu 17.04 amd64
-  - Added support for Visual Studio 2017 amd64
-  - Added option to override OpenCV Detection for when you're sure its there (OVERRIDE_OPENCV)
-  - VC14: Now requires OpenCV3.2 (VC12 still requires OpenCV3.0, Linux now requires OpenCV3.2 as well (only tested Ubuntu 16.10))
-  - VC14: Will not statically link OpenCV, you will need opencv_world320.dll in the w2x folder.
-  - Added Cuda checks to prevent the cuda code mess, and get rid of the extra NoCuda branch of max20091 may or may not work properly, I have no nVidia GPU to test
-  - Fixed CL-binary file handling (See: [f963753](https://github.com/DeadSix27/waifu2x-converter-cpp/commit/f963753227a09749291e93bd6769446ba1bb3945))
-  - Added recursive folder conversion
-  - TODO: Add proper UTF8/Unicode support
+  - See here for every change (too many to list):
+  https://github.com/tanakamura/waifu2x-converter-cpp/compare/c427738c169545f7ac86d5d0083bfae4a41b696f...DeadSix27:master