Tux as a glyph— and Reddit, too

 * `U+E000` in the [Linux Libertine](http://linuxlibertine.org) font happens to be Tux, so I got rid of the calls to the image and just used a glyph using OTF, TTF, WOFF, and SVG formats.
 * Mention of our subreddit was had, at least until we get a darn mailing list.
 * I did add a `monolinks` to replace the inline styling done on the `#euglug` mention that ultimately does the same thing, a monospace font.
 * …other minor changes, as usual.