Add category migration
Init category model
Init categories controller
Implement crud of categories
完善问答逻辑以及前端
Show category tree on index page
save from category yaml file
Refacotr save_yaml on category model
Add category rspec
category rspec
category rspec
category rspec
Add category name validation
refacotr category rspec
update questions logic
Merge branch 'master' of github.com:mindpin/eshare
update gemfile
update css
Merge branch 'master' into fushang318
merge