Add livereload, guard, and jekyll-plus

Also cleans up and organizes Gemfile
Drop jekyll-plus and upgrade to Jekyll 2.0
Add Guardfile for livereload
Update config to be jekyll 2.0 compatible
Update Font-Awesome sprockets integration
The future of chef-rvm
WIP Draft of Evolution of a presentation
New post: The future of chef-rvm
Improve rake draft publishing task