Code and Additional Resources

FanycyApps.com
Zip file for Twenty Fifteen Theme

Enqueue Scripts for Lightbox

function twentyfifteen_theme_add_lightbox(){
	wp_enqueue_script('jquery');
	wp_enqueue_script('fancybox', get_stylesheet_directory_uri() . '/include/jquery.fancybox.pack.js', array('jquery'), false, true);
	wp_enqueue_script('lightbox', get_stylesheet_directory_uri() . '/include/lightbox.js', array('jquery'), false, true);
	wp_enqueue_style ('lightbox-style', get_stylesheet_directory_uri() . '/include/jquery.fancybox.css');
}

add_action('wp_enqueue_scripts', 'twentyfifteen_theme_add_lightbox');

Enqueue Scripts for Google Fonts

function google_fonts() {
	$query_args = array(
		'family' => 'Open+Sans:400,700|Oswald:700',
		'subset' => 'latin,latin-ext',
	);
	wp_register_style( 'google_fonts', add_query_arg( $query_args, "//fonts.googleapis.com/css" ), array(), null );
}

add_action('wp_enqueue_scripts', 'google_fonts');

.entry-title a {
	color: green;
	font-family: 'Open Sans', sans-serif;
}