added dynamic tagline to posts and conditional display statement on partial view

_includes/themes/twitter/post.html

@@ -1,5 +1,5 @@
 <div class="page-header">
-  <h1>{{ page.title }} <small>{{page.description}}</small></h1>
+  <h1>{{ page.title }} {% if page.tagline %}<small>{{page.tagline}}</small>{% endif %}</h1>
 </div>
 
 <div class="row">

_posts/core-samples/2011-12-29-jekyll-introduction.md

@@ -1,6 +1,7 @@
 ---
 layout: post
 category : lessons
+tagline: "Supporting tagline"
 tags : [intro, beginner, jekyll, tutorial]
 ---
 {% include JB/setup %}