added windows .bats

windows_build/SDL2.dll

windows_build/SDL2_image.dll

windows_build/SDL2_ttf.dll

windows_build/assignment.bat

windows_build/examples.bat

windows_build/libfreetype-6.dll

windows_build/libjpeg-9.dll

windows_build/libpng16-16.dll

windows_build/libtiff-5.dll

windows_build/libwebp-7.dll

windows_build/zlib1.dll