Merge pull request #328 from warmdawn/dev

change class name
Merge pull request #1 from cnnic/dev

Dev
chinese period to english counterparts
Merge remote-tracking branch 'origin/dev' into dev
Merge pull request #329 from wade1012/dev

Dev Wade
add some comments for dao
Merge pull request #330 from wade1012/dev

add some comments for dao
refine docs
Merge pull request #331 from forumbyr/master

refine docs
add docs for service and impl;