Added an option to disable compiler warnings

add /WX mscv compiler option for only mscv compiler

clang on windows support both gcc and mscv style options. Clang.exe on windows
defaults to gcc style, which will result in /WX unknown compiler command.
This will set /WX if and only if the compiler is MSVC and greater than version 1900

yaourt is outdated and insecure, use yay in README.md