Css improved in layout
Add a picture to home page
Modify application.rn to compatile Asset Pipeline
Improve css
fix name bug
Add route
Moodify header and footer html file to replace '#' to concrete paths
refactor multiple visits in rspec to single before block
refactor using subject rspec
Refactor rspec finished: define full_title in /spec/support/utilities.rb
Finish layout and routs