Setup menu

- split hero into title, nav. bar and logo
- put top-level pages directly in layout dir. vs. individ. sections
- converted toml config to yaml
- modified meta description

layouts/partials/tagline.html

@@ -0,0 +1,7 @@
+<div style="text-align: center;">
+<div class="hero-tagline">
+  <!-- [> “Live, love and Linux.” <] -->
+  <p>Live, love and <img src="{{ "/img/linux-icon.svg" | relURL }}"
+                          class="icon"
+  alt="linux-icon"/>.</p>
+</div>