Initial commit: site code, layouts, content (images added separately)

Fixes duplicate placeholder cover image on the 3 newest blog posts,
broken aspect-ratio classes on the albums listing page, and a
non-responsive fixed sidebar on the chat page.

archetypes/default.md

@@ -0,0 +1,5 @@
+---
+date: '{{ .Date }}'
+draft: true
+title: '{{ replace .File.ContentBaseName "-" " " | title }}'
+---