sqlite3移到development group
Remove redundancy codes in home#index
新增user_id欄位到posts
新增shoulda這個gem並require
加入devise的tests helper進去spec helper裡面
Done the association model test of post and user.
Add user id to post form. Add user name to post's index.html
Add application.yml to .gitignore
Set i18n yml file
Add country classification to posts
Resolve conflict