Update document
Improve Utility class
Refactoring MODEL Module
Add `load.error` param
Improve ajax callback
Remove `gns` param
Update document
Fix bug of expires control
Modify callback behavior
Extend `update.balance` group callback parameter
Add `update.cache` group callback
Optimize verify process
Change callback context and parameters
Improve HTML Parser
Optimize mixin use
Optimize utility use
Optimize cache use
Optimize database use
Optimize event behavior
Optimize url control