Markdown is important for documentation, it is very nice to see README.md can be automatically show in html format in github like https://github.com/twitter/bootstr
I use this tampermonkey script in chrome to render README.md files as html, directly in gitweb:
https://gist.github.com/nemoo/ee47cd9ad2a5b4fffffdfa Works nicely even if you do not have access to the gitweb server.