Merge pull request #308 from liuchuangww/user

Refactor custom form and fix some bug
User page in system module
Merge pull request #309 from sexnothing/user

User page in system module
Replaced $this->escape helper with syntactic sugart _escape
User template in system module
Merge pull request #311 from sexnothing/user

User template in system module
Removed order from role form/validator
Add permission