Finish docs

[kejace]

Please see https://kejace.github.io/hs-abci/ for live copy

Make PRs against #206

• [ ] add google analytics (UA-111781922-12)
• [ ] work on haddocks @blinky3713
• [x] polish docs @charlescrain @IvantheTricourne
• [x] QA QA QA @charlescrain @IvantheTricourne
• [x] change all references from hs-abci to kepler @kejace
• [x] update all licenses to Apache @kejace
• [x] rename on GitHub @kejace
• [x] publish gh-pages in settings @kejace
• [x] point kepler.dev to github pages @kejace

[IvantheTricourne]

Super slick looking site! I'll just suggest some fixes:

• Links in the table of contents are broken (i.e., all the links are pointing to the raw README).
• Types - typo "like in the definition of NamespaceError" should be NameserviceError.
• Logging
  • typo "Katip logs are manager by scribes whos job..." should be "whose"
  • the images/screenshots are missing