minor #856 Made some tweaks in the README (javiereguiluz)

This PR was squashed before being merged into the master branch (closes #856).

Discussion
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Made some tweaks in the README

Commits
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a86cebb Made some tweaks in the README

Author: javiereguiluz

README.md

@@ -2,20 +2,18 @@ Symfony Demo Application
 ========================
 
 The "Symfony Demo Application" is a reference application created to show how
-to develop Symfony applications following the recommended best practices.
+to develop applications following the [Symfony Best Practices][1].
 
 Requirements
 ------------
 
   * PHP 7.1.3 or higher;
   * PDO-SQLite PHP extension enabled;
-  * and the [usual Symfony application requirements][1].
+  * and the [usual Symfony application requirements][2].
 
 Installation
 ------------
 
-Execute this command to install the project:
-
 ```bash
 $ composer create-project symfony/symfony-demo
 ```
@@ -32,8 +30,8 @@ $ cd symfony-demo/
 $ php bin/console server:run
 ```
 
-Alternatively, you can [configure a fully-featured web server][2] like Nginx
-or Apache to run the application.
+Alternatively, you can [configure a web server][3] like Nginx or Apache to run
+the application.
 
 Tests
 -----
@@ -42,8 +40,9 @@ Execute this command to run tests:
 
 ```bash
 $ cd symfony-demo/
-$ ./vendor/bin/simple-phpunit
+$ ./bin/phpunit
 ```
 
-[1]: https://symfony.com/doc/current/reference/requirements.html
-[2]: https://symfony.com/doc/current/cookbook/configuration/web_server_configuration.html
+[1]: https://symfony.com/doc/current/best_practices/index.html
+[2]: https://symfony.com/doc/current/reference/requirements.html
+[3]: https://symfony.com/doc/current/cookbook/configuration/web_server_configuration.html