能否讲一下这些包的使用？
“prettus/l5-repository”: “^2.1”,
“thetispro/laravel5-setting”: “dev-master”,
“zizaco/entrust”: “dev-laravel-5-2@dev”,
“ryan/toastr-for-laravel”: “^1.0”,
“league/fractal”: “^0.13.0”,
“davejamesmiller/laravel-breadcrumbs”: “^3.0” 