Fixed #85, add normalize

Author: Ivan Demidov

docs/_includes/header.html

@@ -2,6 +2,7 @@
 
 <title>{{ page.title }}</title>
 
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/4.0.0/normalize.min.css">
 <link rel="stylesheet" href="{{ page.base_url }}assets/css/demo.css">
 <link rel="stylesheet" href="{{ page.base_url }}assets/css/pygments-manni.css">
 <link rel="stylesheet" href="{{ page.base_url }}dist/css/slims.min.css">