Add comments and its tests. Some bugs are there
Bug fixed
Fix some rspec tests
Add files in
Rename the comments views for partial
Fix some problems for rspec tests
comment system finished
add a test for comment
finishd replying replies
Merge branch 'feature/comment' of github.com:KevinXuxuxu/XuetangProject into feature/comment
Merge pull request #4 from KevinXuxuxu/feature/comment

Feature/comment