Add a hepler to show title
Add HTML layout to application.html.erb
Add links and a logo to Home page view
Introduce Bootstrap (Twitter)
Add custom css for Bootstrap
Add a basic css to custom.css.scss
Add a basic typography to custom.css.scss
Add a style to logo in custom.css.scss
Add three partials -- shim/header/footer
Optimize the stylesheet in custom.css.scss
Use variables in custom.css.scss

- Use variables in custom.css.scss
- try replacing tabs to 4 spaces.
Clean the css in custom.css.scss

- Replace the raw color indications to LESS variables
Add contact action and change the raw paths to named route

- Add contact action to finish contact page.
- change the raw paths such as 'about/contact' to named route.
Improve config/routes.rb to use "match via 'get"
Revise the links in partials to named routes

- Revise _header.html.erb so that the links are named routes
- Revise _footer.html.erb so that the links are named routes
Refactor static_pages.spec test

- Refactor static_pages_spec test so that advanced method are used.
Add Users controller/action and signup route

- Add Users controller/action by rails generate
- Add signup route to user/new
Finish layout and routes