Nuke shortcode plugin (it's broken).

[ci skip]
Simplify view partials.
Cache header and footer partials.
Whitespace.

[ci skip]
Use `docs` collection for search results.
Simplify document title logic.
Tweak browser update notice.
Remove a couple of misplaced back ticks.
Minify inline CSS in HTML files.
Move favicon to document root.
Also revision image assets.
Add UnCSS task to build chain.
Use "Source Code Pro" as monospace font.
Refactor docs search to minimize deps.

Oboe and Vue are no longer necessary now that jQuery can be used
instead.
Add missing categories meta to "Features" page.
Fix search.
Whitespace.

[ci skip]
Remove Glyphicon fonts from Bootstrap overrides.

[ci skip]
Add dimensions to header logo.
Fix bad filename.