Move CSS files to includes.

Rakefile

@@ -156,7 +156,7 @@ namespace :site do
 
   desc "Update normalize.css library to the latest version and minify"
   task :update_normalize_css do
-    Dir.chdir("site/css") do
+    Dir.chdir("site/_includes/css") do
       sh 'curl "http://necolas.github.io/normalize.css/latest/normalize.css" -o "normalize.scss"'
       sh 'sass "normalize.scss":"normalize.css" --style compressed'
       sh 'rm "normalize.scss"'

site/_includes/top.html

@@ -8,10 +8,7 @@
   <link rel="alternate" type="application/atom+xml" title="Recent commits to Jekyll’s master branch" href="{{ site.repository }}/commits/master.atom" />
   <link href='http://fonts.googleapis.com/css?family=Lato:100,300,400,700,900,100italic,300italic,400italic,700italic,900italic' rel='stylesheet' type='text/css'>
   <link href='http://fonts.googleapis.com/css?family=Arizonia' rel='stylesheet' type='text/css'>
-  <link rel="stylesheet" href="{{ site.url }}/css/normalize.css" />
-  <link rel="stylesheet" href="{{ site.url }}/css/gridism.css" />
-  <link rel="stylesheet" href="{{ site.url }}/css/style.css" />
-  <link rel="stylesheet" href="{{ site.url }}/css/pygments.css" />
+  <link rel="stylesheet" href="{{ site.url }}/css/screen.css" />
   <link rel="icon" type="image/png" href="{{ site.url }}/favicon.png" />
   <script src="{{ site.url }}/js/modernizr-2.5.3.min.js"></script>
 </head>

site/css/screen.css

@@ -0,0 +1,11 @@
+---
+---
+
+{% capture screen %}
+{% include css/normalize.css %}
+{% include css/gridism.css %}
+{% include css/style.css %}
+{% include css/pygments.css %}
+{% endcapture %}
+
+{{ screen | strip_newlines | remove: '  ' }}