How to show high resolution logo on retina displays in Genesis using Foundation Interchange.

functions.php

<?php
//* Do NOT include the opening php tag

//* Enqueue Foundation Interchnage
add_action( 'wp_enqueue_scripts', 'sk_foundation_interchange' );
/**
 * Load Foundation and Foundation Interchange in the Footer.
 * Initialize Foundation in the Footer.
 *
 * @author Sridhar Katakam
 * @link   http://sridharkatakam.com/show-high-resolution-logo-retina-displays-genesis-using-foundation-interchange/
 */
function sk_foundation_interchange() {

	wp_enqueue_script( 'foundation', get_bloginfo( 'stylesheet_directory' ) . '/js/foundation.js', array( 'jquery' ), '', true );

	wp_enqueue_script( 'foundation-interchange', get_bloginfo( 'stylesheet_directory' ) . '/js/foundation.interchange.js', array( 'foundation' ), '', true );

	wp_enqueue_script( 'global', get_stylesheet_directory_uri() . '/js/global.js', array( 'jquery' ), '', true );

}

gistfile1.php

$logo = '<img src="' . get_stylesheet_directory_uri() . '/images/logo.png" alt="' . esc_attr( get_bloginfo( 'name' ) ) . '">';

gistfile2.php

$logo = '<img data-interchange="[' . get_stylesheet_directory_uri() . '/images/logo.png, (default)], [' . get_stylesheet_directory_uri() . '/images/logo@2x.png, (retina)]" alt="' . esc_attr( get_bloginfo( 'name' ) ) . '">';

global.js

jQuery(document).ready(function($) {

	// Initialize Foundation
	$(document).foundation();

});

style.css

/* Foundation Interchange */

meta.foundation-version {
	font-family: "/5.4.7/";
}

meta.foundation-mq-small {
	font-family: "/only screen/";
	width: 0em;
}

meta.foundation-mq-medium {
	font-family: "/only screen and (min-width:40.063em)/";
	width: 40.063em;
}

meta.foundation-mq-large {
	font-family: "/only screen and (min-width:64.063em)/";
	width: 64.063em;
}

meta.foundation-mq-xlarge {
	font-family: "/only screen and (min-width:90.063em)/";
	width: 90.063em;
}

meta.foundation-mq-xxlarge {
	font-family: "/only screen and (min-width:120.063em)/";
	width: 120.063em;
}

meta.foundation-data-attribute-namespace {
	font-family: false;
}