Laravel / Intervention Image Class - class not found

Question

I just installed Intervention Image Class following instructions from here: http://image.intervention.io/getting_started/installation

I also added these 2 lines into

Answer 1

"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"require": {
    "laravel/framework": "4.2.*",
    "intervention/image": "dev-master"
},

add new code "intervention/image": "dev-master" in composer.json, and cmd

$ composer update