Add some badass styles

* Update colors and layout
* Add new fonts
* New svg logo with animation
* Improve styles of sky-labels on form

I'm not sure why yet, but it seems that Github Pages aren't building the sass, so I've been manually:

1. Removing the yaml frontmatter from `css/main.sass`
2. running `sass main.scss main.css -I_sass` and staging the result.
3. Undoing the `css/main.sass` change so that it'll still be recognized by jekyll locally.

I think it's actually a GitHub bug but I haven't gotten around to complaining/further investigation yet.