nav: blog index -> horizontal header

index.php switches from header-home (sidebar nav) to the default header.php
(horizontal). Studio stays on header-home (keeps its preloader); About keeps the
sidebar nav.

index.php

@@ -1,4 +1,4 @@
-<?php get_header('home'); ?>
+<?php get_header(); ?>
 	<video id="tv" preload="none" loop="loop" poster="wp-content/themes/dw/img/tv.jpg">
 	     <source src="<?php echo get_template_directory_uri();?>/img/tv.mp4" type="video/mp4">
 	     <source src="<?php echo get_template_directory_uri();?>/img/tv.webm" type="video/webm">