All: Add support for banner-secondary to regular Markdown pages

This is currently limited to pages that use page-fullwidth.php.
The default page.php, which includes a sidebar, does not support it,
which means that pages such as those on brand.jquery.org that currently
place banner-secondary into their HTML content, are not able to
switch to Markdown unless they keep hardcoding the HTML, or switch to
a sidebar-less template.

Author: Krinkle

themes/jquery/page-fullwidth.php

@@ -10,7 +10,7 @@
 <div class="content-full full-width twelve columns">
 	<div id="content">
 		<?php if ( get_post_meta( $post->ID, "subtitle" ) ) : ?>
-		<div id="banner-secondary" class="large-banner entry-header">
+		<div id="banner-secondary" class="large-banner">
 			<h1 class="entry-title"><?php the_title(); ?></h1>
 			<p><?php echo get_post_meta( $post->ID, "subtitle", true ); ?></p>
 		</div>

themes/jquery/page.php

@@ -4,7 +4,12 @@
 
 <div class="content-right twelve columns">
 	<div id="content">
-		<?php if ( !count( get_post_meta( $post->ID, "hide_title" ) ) ) : ?>
+		<?php if ( get_post_meta( $post->ID, "subtitle" ) ) : ?>
+		<div id="banner-secondary" class="large-banner">
+			<h1 class="entry-title"><?php the_title(); ?></h1>
+			<p><?php echo get_post_meta( $post->ID, "subtitle", true ); ?></p>
+		</div>
+		<?php elseif ( !count( get_post_meta( $post->ID, "hide_title" ) ) ) : ?>
 		<h1 class="entry-title"><?php the_title(); ?></h1>
 		<hr>
 		<?php endif; ?>