Merge pull request #38 from googlecodelabs/serve-fixes

claat serve: grey background and MS Windows fixes

Author: x1ddos

claat/render/template.html

@@ -24,9 +24,10 @@
   <script src="{{.Prefix}}bower_components/webcomponentsjs/webcomponents-lite.js"></script>
   <link rel="import" href="{{.Prefix}}elements/codelab.html">
   <link rel="stylesheet" href="//fonts.googleapis.com/css?family=Source+Code+Pro:400|Roboto:400,300,400italic,500,700|Roboto+Mono">
-  <style>
+  <style is="custom-style">
     body {
       font-family: "Roboto",sans-serif;
+      background: var(--google-codelab-background, --paper-grey-300);
     }
   </style>
   <!-- TODO: add theming