solving conflict
Merge branch 'master' of https://github.com/Thu-SaaS-CloudComputing/CloudComputing
push to heroku
Solve some conflicts in visitor_index_feature
Merge branch 'master' of https://github.com/Thu-SaaS-CloudComputing/CloudComputing
To get newest version. Not know why should be merged.
Add spec.The tree should store object instead of name
Merge branch 'master' of https://github.com/Thu-SaaS-CloudComputing/CloudComputing
Not knowing why this merge is necessary:
Merge branch 'fix/category-tree' of https://github.com/Thu-SaaS-CloudComputing/CloudComputing into fix/category-tree
Fix some errors in category-tree
Errors of category tree finished
Merge pull request #11 from Thu-SaaS-CloudComputing/fix/category-tree

Fix/category tree
move debugger to group debug.

travis now force bundle install failed when install debugger
Merge branch 'master' into feature/article