[BioRuby] Restyling BioRuby.org

[Raoul Bonnal]

George have summarised some of the points raised during irc meeting:
here at http://bioruby.open-bio.org/wiki/Bioruby_site_Re-styling

About :" support example code snippets that can be run from the browser
* it would be great if we had a set of tutorials that users can follow in
the browser"
A starting point is http://bioruby.open-bio.org/wiki/BioRubyOnRails,  I
think Katayama did it.