Several changes made:

* Do not overload entry point
 * Automatically call Program::__construct()
 * Automatically call Program::main();
 * Fix all tests

tests/hello_world.aer

@@ -1,9 +1,7 @@
-class Main {
+class Program {
 
-	public function __construct() {
+	public function main() {
 		print('Hello world!');
 	}
 
 }
-
-new Main();