Merge pull request #82 from up9cloud/master

add render by string example.

README.md

@@ -43,6 +43,15 @@ $app->get('/hello/{name}', function ($request, $response, $args) {
     ]);
 })->setName('profile');
 
+// Render from string
+$app->get('/hi/{name}', function ($request, $response, $args) {
+    $str = $this->view->fetchFromString('<p>Hi, my name is {{ name }}.</p>', [
+        'name' => $args['name']
+    ]);
+    $response->getBody()->write($str);
+    return $response;
+});
+
 // Run app
 $app->run();
 ```