Windows 8.1

Also fixes a bug where resolution would be displayed as "x" when wmic cannot display the resolution for whatever reason. (screenfetch doesn't list "Resolution:" in this case)
![screenfetch-screenshot](https://f.cloud.github.com/assets/462101/2257461/2bd0ef80-9e1a-11e3-8492-cfe412a1f69f.PNG)