Need this for Genesis 2.0 childtheme. Add to functions.php

gistfile1.txt

/* SERIOUSLY? */
add_action( 'genesis_meta', 'sample_viewport_meta_tag' );
function sample_viewport_meta_tag() {
	echo '<meta name="viewport" content="width=device-width, initial-scale=1.0"/>';
}

add_theme_support( 'html5' );