- quick clean up pass on layout and colors for clarity/legibility
- added logo to the sidebar
- fix various css things like a full height page when content is shorter, so the footer doesn't creep away from the bottom
- start using em instead of px for consistency across devices
- Break embedding out into a separate section with multiple pages.
- Document the constraints on the API.
- Document the slot array and WrenValue.
Still lots more to do, but getting there...
- Rename "Expressions" -> "Method Calls".
- Organize "Types" and "Language" into a single linear narrative.
- Mobile-specific navigation to handle the longer guide.
- Rename "Fibers" -> "Concurrency".
- Get rid of duplicate stuff about signatures in "Classes".
- Add next/prev links to each page in the guide.
- Move "Contributing" and "Community" up to the top level.
- Move the precendence table to a separate "Grammar" page.
- Lots of other little stuff.
