Fixed psr-4 configuration in composer.json

Author: oscarotero

composer.json

@@ -21,8 +21,8 @@
 		"php": ">=5.3.0"
 	},
 	"autoload": {
-		"psr-0": {
-			"Embed": ""
+		"psr-4": {
+			"Embed\\": "src"
 		}
 	}
 }