Updated remote service
Fix logging service
Merge pull request #553 from liuchuangww/user

User
Code cleaning up
Check DB connection upon DB name change
Updated nav specs
Moved Block classes to dedicated folder `Block`
Added syntactic sugar for i18n
Added preAction/postAction to controller action
Updated system i18n
Updated system i18n
Updated theme i18n
Moved custom static files to `static/custom`
Code cleaning up
Doc update
Updated doc
Update locale for article
Update local for comment
Update locale for demo
Update locale for message