Allow version check in application entry file to work

By putting the class name, which contains PHP 5.3 namespace separator tokens, as a variable and then dynamically calling the class, the parse error on PHP < 5.3 is prevented and the version check at the top of the file can work as expected.

Fixes 62

Author: jrfnl

parallel-lint

@@ -70,5 +70,7 @@ if (!$loaded) {
 
 require_once __DIR__ . '/src/polyfill.php';
 
-$app = new JakubOnderka\PhpParallelLint\Application();
+// Prevent parse error on PHP < 5.3 so the version check above can work.
+$className = 'JakubOnderka\PhpParallelLint\Application';
+$app = new $className();
 exit($app->run());