[BioRuby] Ruby documentation with syntax highlight (Wiki no more)

[Pjotr Prins]

Github has syntax highlighting for markdown. This has potential for
all Ruby documents! We can maintain docs in git, and they get
displayed on github.

  http://github.github.com/github-flavored-markdown/

Example

  https://github.com/pjotrp/bioruby-gem/blob/master/doc/biogem-hacking.md

No more wiki documentation, as far as I am concerned.

Pj.