Update Windows binary to v1.3.1

Source:

*
http://sourceforge.net/projects/libjpeg-turbo/files/1.3.1/libjpeg-turbo-
1.3.1-gcc.exe/download (x86)
*
http://sourceforge.net/projects/libjpeg-turbo/files/1.3.1/libjpeg-turbo-
1.3.1-gcc64.exe/download (x64)