Add blank header and footer files for rdoc (required because we're not generating full HTML page)
Add blank header and footer files for rdoc (required because we're not generating full HTML page)
Remove obsolete section.description tag from rdoc template
Fool rdoc/darkfish into not messing with our template

Code in rdoc 4.0.1 darkfish generator looks for the string <html in the template, and if it's not found, prepends <html> and <head> tags. We do not
want this because we generating Markdown. So hide the magic string in an HTML comment where it won't break jekyll later on.
Add rdoc working directory to .gitignore
Hardcode the Specification class description into the rdoc class template

We only use this template to generate the specification reference. Unfortunately rdoc doesn't see the description in the source
for Specification, because it is above the class name line. This will need to be fixed upstream in the rubygems code. For now,
just extract the current description from the rubygems source to get unstuck.
Regenerate specification reference
Add Richard Michael to the contributors list