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/_default/video.html

@@ -0,0 +1,21 @@
+{{ partial "header.html" . }}
+    <h1>{{ .Title }}</h1>
+
+    <video poster="{{ with .Resources.GetMatch "images/*.png" }}{{ .Permalink }}{{ end }}" controls crossorigin playsinline preload="none">
+      <!-- Video files -->
+      {{ with .Resources.GetMatch "*.mp4" }}<source src="{{ .Permalink }}" type="video/mp4">{{ end }}
+      {{ with .Resources.GetMatch "*.webm" }}<source src="{{ .Permalink }}" type="video/webm">{{ end }}
+
+      <!-- Caption files -->
+      {{ with .Resources.GetMatch "*.en.vtt" }}<track src="{{ .Permalink }}" kind="captions" label="English" srclang="en" default>{{ end }}
+
+      <!-- Fallback for browsers that don't support the <video> element -->
+      Your browser doesn't support HTML5 video. {{ with .Resources.GetMatch "*.mp4" }}<a href="{{ .Permalink }}">Click here to view the raw .mp4 video.</a>{{ end }}
+    </video>
+    <div>
+      <a class="no-underline" id="logo" href="{{ .Site.BaseURL }}" title="{{ .Site.Title }}" aria-label="{{ .Site.Title }}">
+{{ partial "logo.html" . }}
+      </a>
+    </div>
+    {{ .Content }}
+{{ partial "footer.html" . }}