Encapsulate the production of rdoc documentation. Basically you can use
this as you would invoke rdoc from the command line:
rdoc = RDoc::RDoc.new
where args is an array of strings, each corresponding to an
argument you'd give rdoc on the command line. See rdoc/rdoc.rb for details.
Format up one or more files according to the given arguments. For
simplicity, argv is an array of strings, equivalent to the strings
that would be passed on the command line. (This isn't a coincidence, as we
do pass in ARGV when running interactively). For a list of
options, see rdoc/rdoc.rb. By
default, output will be stored in a directory called doc below the
current directory, so make sure you're somewhere writable before invoking.
Throws: RDocError on error