added support for custom includes

.themes/classic/source/_includes/custom/asides/about.html

@@ -0,0 +1,4 @@
+<section>
+  <h1>About Me</h1>
+  <p>A little something about me.</p>
+</section>

.themes/classic/source/_includes/custom/head.html

@@ -0,0 +1,3 @@
+<!--Fonts from Google's Web font directory at http://google.com/webfonts -->
+<link href='http://fonts.googleapis.com/css?family=PT+Serif:regular,italic,bold,bolditalic' rel='stylesheet' type='text/css'>
+<link href='http://fonts.googleapis.com/css?family=PT+Sans:regular,italic,bold,bolditalic' rel='stylesheet' type='text/css'>

.themes/classic/source/_includes/head.html

@@ -25,11 +25,10 @@
   <script src="{{ root_url }}/javascripts/modernizr-2.0.js"></script>
   <script src="http://s3.amazonaws.com/ender-js/jeesh.min.js"></script>
   <script src="{{ root_url }}/javascripts/octopress.js" type="text/javascript"></script>
-  <link href='http://fonts.googleapis.com/css?family=PT+Serif:regular,italic,bold,bolditalic' rel='stylesheet' type='text/css'>
-  <link href='http://fonts.googleapis.com/css?family=PT+Sans:regular,italic,bold,bolditalic' rel='stylesheet' type='text/css'>
   {% capture rss_url %}{% if site.subscribe_rss contains ':' %}{{ site.subscribe_rss }}{% else %}{{ root_url }}{{ site.subscribe_rss }}{% endif %}{% endcapture %}
   <link href="{{ rss_url }}" rel="alternate" title="{{site.title}}" type="application/atom+xml"/>
   {% include google_analytics.html %}
   {% include google_plus_one.html %}
   {% include twitter_sharing.html %}
+  {% include custom/head.html %}
 </head>