Add to the README more required dependencies (#69)

* Add another required dependency
* Add Windows SDK as well

Author: nir9

README.md

@@ -135,8 +135,12 @@ dll because it will be loaded into each process address space.
 COMPILING
 =========
 
-dwm-win32 requires [zig](https://ziglang.org/) to compile. Source code for dwm-win32 is written in C and uses `zig cc` to compile C to native code.
-You can install the compiler by using [scoop](https://scoop.sh) as `scoop install zig`.
+To compile, dwm-win32 requires:
+- [Visual Studio C/C++ Build Tools and Windows SDK](https://visualstudio.microsoft.com/downloads/) (You can use the Visual Studio Installer to download only headless c/c++ build tools and windows sdk without the full IDE)
+- [zig](https://ziglang.org/)
+
+Source code for dwm-win32 is written in C and uses `zig cc` to compile C to native code.
+You can install the Zig compiler by using [scoop](https://scoop.sh) as `scoop install zig`.
 
 ```cmd
 build.cmd