Add composer autoload instructions

Author: imkingdavid

composer.json

@@ -3,5 +3,10 @@
 	"license": "MIT",
 	"require": {
 		"php": ">=5.4.0"
+	},
+	"autoload": {
+		"psr-4": {
+			"imkingdavid\\LoadTimer\\": ""
+		}
 	}
 }