change '资产' -> '资源'
fix static asset - > '静态资源'

Reference:
asset pipeline in rails http://guides.ruby-china.org/asset_pipeline.html
asset catalog in iOS http://mued.sohu.com/2013/06/ios-7-ui-transition-guide/
Merge branch 'master' of github.com:weekwood/keystone
revert to '资产'
fix static asset
Merge pull request #801 from weekwood/master

fix asset translation