Çözümü
start->global.php ve composer.json içinde kullancağımız alt dizinleri tanımlamamız gerekiyor.
start->global.php
ClassLoader::addDirectories(array(
app_path().'/commands',
app_path().'/controllers',
app_path().'/controllers/admin',
app_path().'/controllers/public',
app_path().'/models',
app_path().'/database/seeds',
));
ve composer.json
"autoload": {
"classmap": [
"app/commands",
"app/controllers",
"app/controllers/admin",
"app/controllers/public",
"app/models",
"app/database/migrations",
"app/database/seeds",
"app/tests/TestCase.php"
]