You have to autoload from your composer.json

{
    "autoload": {
        "files": ["restclient.php"]
    }
}

Thanks RemiCollin but it didn't work. I have some error

[Seld\JsonLint\ParsingException]
"./composer.json" does not contain valid JSON
Parse error on line 10:
... "classmap": [ //"files": ["restcli
--------------------^
Expected one of: 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '[', ']'

You must have a missing comma somewhere. Paste your composer.json.

{ "name": "laravel/laravel", "description": "The Laravel Framework.", "keywords": ["framework", "laravel"], "license": "MIT", "require": { "laravel/framework": "4.2.*" }, "autoload": { "classmap": [ "files": ["restclient.php"], "app/commands", "app/controllers", "app/models", "app/database/migrations", "app/database/seeds", "app/tests/TestCase.php"

	]
},
"scripts": {
	"post-install-cmd": [
		"php artisan clear-compiled",
		"php artisan optimize"
	],
	"post-update-cmd": [
		"php artisan clear-compiled",
		"php artisan optimize"
	],
	"post-create-project-cmd": [
		"php artisan key:generate"
	]
},
"config": {
	"preferred-install": "dist"
},
"minimum-stability": "stable"

}