Fixed docs site, and removed lots of stuff.

- Had to come up with my own Jekyll Convertible to allow pages to be
  added from outsite the site's source.
- Changed docs options key `dir` to `path` to be similar to Octopress Ink.
- Now properly requiring plugins using Jekyll's plugin_manager
- Fixed an issue where Jekyll wouldn't find the docs site in the gem path.
- Removed lots of old docs files.
Fixed sorting of docs, refactored a bit and added comments
refactored docs pages data