Add Gemfile.

Installing jekyll (once you have bundler) is now as simple as,
"bundle install".  This is the recommended way to install jekyll
according to https://help.github.com/articles/using-jekyll-with-pages
Update README.md

github pages appear not to be generated until I make a push to the repo.  So make a little edit to README.md.
Update 'about this site' page.
Deleted _posts/2013-06-10-another-post.md
Deleted _posts/2013-06-16-hello-again.md
Created 2013-10-01-hello-prose-io.md
Publish new blog post!
Update site url in _config.yml
Update site title