Merge pull request #18 from cremno/update

some small updates

Author: bovi

_config.yml

@@ -2,7 +2,7 @@ name: mruby
 markdown: kramdown
 kramdown:
   input: GFM
-pygments: true
+highlighter: pygments
 exclude:
 - Gemfile
 - Gemfile.lock

_includes/header.html

@@ -1,16 +1,15 @@
         <meta charset="utf-8">
-        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
 
         <title>{{ page.title }}</title>
 
         <!-- Latest compiled and minified CSS -->
-        <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css">
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
 
         <!-- Optional theme -->
-        <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap-theme.min.css">
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap-theme.min.css">
 
         <!-- Latest compiled and minified JavaScript -->
-        <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script>
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
 
         <!-- syntax highlighting CSS -->
         <link rel="stylesheet" href="/css/syntax.css">