Ensure rdoc from gem is being used

Ruby 1.9.3 has bundled rdoc which does not provide RDoc::Markup.parse
Merge branch 'master' of git://github.com/johanek/puppet-parse into argv_additions
Added RDoc stuff back
(rdoc issue fixed in 4d00f9d3e383a388a484ae255bc4acc9875438cb)
Removed comment