huge refactoring of content and theme

- de-personalize the theme as much as possible, moving personal info into config.toml parameters
- extract hard-coded content out layouts and into actual /content (especially home page and all of its assets)
- include full text of posts in RSS feed (aka making the world a better place)
- use abstract layout for both video pages (/leo and /birthday)

layouts/partials/footer.html

@@ -1,5 +1,5 @@
 {{ if eq hugo.Environment "production" }}{{ partial "stats.html" . }}{{ end }}
-</body>
+  </body>
 </html>
 
 {{"<!--" | safeHTML}} {{ hugo.Environment }} {{"-->" | safeHTML}}