Move deployment configuration to config/deploy.yml
Target ruby-2.0.0-p247
Update gems to get running on ruby-2.0.0-p247
Add config/deploy.yml.sample with README instructions
Change Gemfile source to 'https://rubygems.org'
Update Gemfile to use 'https://rubygems.org'
Guard against Middleman::Sitemap::Resource during build generation