Add test for user model
Add guard-rspec
Set up spork
Add test for article model
Add travis-ci
tweak for travis-ci
Add db:migrate to travis.ym
Use bower to manage normalize.css
Add test for home, users and sessions controller
Add test for CURD method in articles_controller
update .travis.yml
Fix a bug in articles_controller

require user to signed in for trash and empty_trash
Add test for empty_trash and trash method