Update style for home page.
Fix typo that caused syntax error in application.html.erb.
Modify Gemfile to use bootstrap-sass gem.
Add custom.css.scss file to include bootstrap.
Update custom.css.scss file.
Update custom.css.scss file to include typography CSS rules.
Update custom.css.scss file to include logo CSS rules.
Add header and shim partials.
Add footer partial and associated CSS rules.
Modify custom.css.scss file to use nesting.
Modify custom.css.scss file to use variables.
Update tests to use new syntax for hashes.
Modify tests to use variables for visit routes.
Modify routes to work with variable for all pages.
Modify partials to use variables for links.
Refactor tests.
Add user_pages controller and associated rspec tests.
Add content and link to signup page.
Test Commit.
Finish layout and routes.