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/pages/responsive/_global.scss

@@ -6,12 +6,11 @@
     // Safari iOS menu bar reappers below 44px:
     // https://www.eventbrite.com/engineering/mobile-safari-why/
     padding-bottom: 45px !important;
-    // Allows content to fill the viewport and go beyond the bottom
-    height: 100%;
     // Allows you to scroll below the viewport; default value is visible
     overflow-y: scroll;
   }
 
   @import 'home';
   @import 'notes';
+  @import 'videos';
 }

assets/sass/pages/responsive/_notes.scss

@@ -13,7 +13,8 @@ body#notes {
       a#logo {
         padding: 10px;
 
-        img, svg {
+        img,
+        svg {
           height: 60px;
           width: auto;
         }

assets/sass/pages/responsive/_videos.scss

@@ -0,0 +1,16 @@
+@charset "UTF-8";
+
+// Responsive Videos
+body#videos {
+  margin: 20px 0;
+
+  h1 {
+    font-size: 1.6em;
+    padding: 0 10px;
+  }
+
+  video {
+    width: 100%;
+    height: auto;
+  }
+}