Restructure examples to ease getting started

Author: clue

examples/dialog.php examples/01-dialog.phpexamples/dialog.php renamed to examples/01-dialog.php

@@ -9,7 +9,7 @@
 $loop = Factory::create();
 $launcher = new Launcher($loop);
 
-$form = new FormsDialog($launcher);
+$form = new FormsDialog();
 $form->setWindowIcon('info');
 $form->setText('Enter user information');
 

examples/file.php examples/02-file.phpexamples/file.php renamed to examples/02-file.php

@@ -10,7 +10,7 @@
 $loop = Factory::create();
 
 $launcher = new Launcher($loop);
-$builder = new Builder($launcher);
+$builder = new Builder();
 
 $main = function() use (&$main, $builder, $launcher) {
     $menu = $builder->listMenu(array('Introduction', 'Tests', 'License', 'Bugs / Issues'), 'Main menu');

examples/progress-pulsate.php examples/03-progress-pulsate.phpexamples/progress-pulsate.php renamed to examples/03-progress-pulsate.php

@@ -18,6 +18,9 @@
 
 $n = 0;
 $loop->addPeriodicTimer(10.0, function ($timer) use ($zen, &$n) {
+    static $icons = array('error', 'warning', 'info', '');
+    $zen->setIcon($icons[array_rand($icons)]);
+
     $zen->setMessage('Hi' . ++$n);
 });