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)

assets/sass/main.scss

@@ -12,10 +12,12 @@
 // Pages
 @import 'pages/home';
 @import 'pages/notes';
+@import 'pages/videos';
 
 // Responsive Pages
 @import 'pages/responsive/global';
 
 // Miscellaneous
+@import 'components/logo';
 @import 'components/syntax';
 @import 'components/wave';