Merge pull request #3 from nighca/detail

Detail page
Merge pull request #4 from nighca/detail

Detail
import db class
Merge pull request #5 from nighca/client

add meta charset & rename readme
add node httpd service modules
Merge pull request #6 from nighca/client

添加代码diff
Merge pull request #7 from nighca/client

adjust diff style
add new module
split getDiff to getLinesDiff & getInlineDiff
adjust code structure
Merge remote-tracking branch 'shao/master' into client
adjust block height