Add content from Listing 5.1 in Rails Tutorial
Add rails.png and extra content to home page
Add line for asset pipeline compatibility.

Add line to Gemfile for bootstrap-sass gem and 'bundle install'.
Add CSS file asset
Add CSS comments and styling
Add header, footer and shim partials
Add footer to default page
Nest CSS sections
Add nesting and variables to custom SCSS file
Comment out Contact in footer and add spec tests
Add contact route and uncomment
Change 'visit' spec lines
Remove duplicated tests, add routes, add helper.
rails generate controller Users new --no-test-framework
Finish layout and routes