Add initial implementation of sidenotes

themes/vanilla/layouts/partials/head.html

@@ -6,7 +6,9 @@
     <link href="https://fonts.googleapis.com/css?family=Inconsolata|Lora|Raleway" rel="stylesheet">
     <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">
     {{ $style := resources.Get "scss/style.scss" | resources.ToCSS | resources.Minify }}
+    {{ $sidenotes:= resources.Get "scss/sidenotes.scss" | resources.ToCSS | resources.Minify }}
     <link rel="stylesheet" href="{{ $style.Permalink }}">
+    <link rel="stylesheet" href="{{ $sidenotes.Permalink }}">
 
     <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-MML-AM_CHTML' async></script>
     {{ template "_internal/google_analytics.html" . }}