Styles for high-resolution screens

[mathiasbynens]

Something that takes the 1.5 value and converts it into all the different needed values would be great:

@media (min--moz-device-pixel-ratio: 1.5),
       (-moz-min-device-pixel-ratio: 1.5),
       (-o-min-device-pixel-ratio: 3/2),
       (-webkit-min-device-pixel-ratio: 1.5),
       (min-device-pixel-ratio: 1.5),
       (min-resolution: 1.5dppx) {
    /* styles for high-resolution screens */
}

Some relevant links:

• High Res device test re: #441 Modernizr/Modernizr#443
• Include a HiDPI closure in the sample media queries h5bp/html5-boilerplate#1127
• https://gist.github.com/2997187