Initial scaffold: Hugo site for west575.org

Blog with contact form and newsletter signup, structured like the
other Reground-hosted sites but with its own visual identity.

layouts/partials/header.html

@@ -0,0 +1,10 @@
+<header class="site">
+  <div class="inner">
+    <a class="brand" href="/">{{ .Site.Title }}</a>
+    <nav aria-label="Primary">
+      {{ range .Site.Menus.main }}
+      <a href="{{ .URL }}"{{ if $.IsMenuCurrent "main" . }} aria-current="page"{{ end }}>{{ .Name }}</a>
+      {{ end }}
+    </nav>
+  </div>
+</header>