Integrate middleman-syntax based syntax highlighting
sitemap.xml + robots.txt
Fix links in /conduct.html
Update link to Rubygems version docs

The current link redirects to http://guides.rubygems.org/#page74 which is meaningless. Without knowing precisely what it use to point to, this link seems most relevant.
update expired rubygems docs links
Translate bundle_update (ko)
Add sub dir for korean site