self-use laravel api tool

基于 trait 的 laravel 模型特性拓展：自动注册模型观察者；创建与更新数据前，自动校验请求数据。

异常化编程拓展

validation support exception

support MySQL 'column comment' and 'table comment'.

Object-oriented route group.use like this: $route->get(...)->as(...)->uses(...)->before(...);