Update README.md and CONTRIBUTING.md (add links to the wiki)
Indicate JavaScript runtime requirement in README.md

Fixes #10. Thanks @jaggli and @forivall.
Add trailing slash redirections

Fixes #13.
Add list of plugins and extensions to the About page
Update Lo-Dash documentation to 2.3.0
Fix single-doc mode detection
Make Docs::Scraper.root_path inheritable
Decode URL fragment before searching for the target element
Make Docs::URL#subpath_to work with unqualified URLs
Make Docs::URL#relative_path_to work with unqualified URLs
Move code in scraper.rb
Set the default FileScraper::base_url to localhost
Add CleanLocalUrls filter for removing localhost URLs

Enabled by default in FileScraper
Don't insert attribution link when the base URL is localhost
Strip heredoc whitespace of attribution text in one place
Update PHP documentation to 5.5.6
Add RDoc scraper and Ruby documentation
CSS tweaks
Update Prism.js with Ruby syntax