Create rails skeleton without unit tests
Gemfile matches version in Rails Tutorial listing 3.1
gitignore matches version in Rails Tutorial

This is the version from listing 1.7.
Generate secret token and store in .secret file

The .secret file is not checked in, per gitignore.
Fix rails project name in secret_token.rb
Install RSpec for unit tests
Update README with chapter-specific information
Precompile assets
Configure CircleCi builds and Heroku deployment