Improve language enhancement methods
Simplify log messages
Fix a bug for unique
Improve specs for util-lang.js
Rebuild packages
Change async value to true
Rebuild packages
Merge preload method to use method
Improve code logic for config method
Rename some variables
Add loc variable for global.location
Add plugins config
Rebuild packages
Tweak code style
Simplify log method
Modify spec for code modification
Rebuild packages
Remove build step from travis script
Update license
Modify preserved information