Import remaining template and styling code from bbaovanc.com

It's probably better structure-wise to have it all consolidated in
bobatheme. Then bbaovanc.com is only concerned about content, not stuff
that I declared to be specific to my site. This came from when I had
multiple sites running bobatheme in the background, so now it's just an
arbitrary, legacy distinction.

Fixes #86

assets/js/share-event.js

@@ -0,0 +1,3 @@
+function share_event(service) {
+    plausible("Share", {props: {Network: service}});
+}