merged branch maxromanovsky/app-config-status-code (PR #516)

This PR was squashed before being merged into the master branch (closes #516).

Discussion
----------

Added status code to app/check.php

This change could be useful in build scripts. `app/check.php` could be executed in order to check that build environment is sane.
Changes:
1. Added status code to `app/check.php`
1. Updated `README.md`

Commits
-------

ded4360 Added status code to app/check.php

Author: fabpot

README.md

@@ -52,6 +52,9 @@ Execute the `check.php` script from the command line:
 
     php app/check.php
 
+`app/check.php` returns status code (`0` if all mandatory requirements were
+met, `1` otherwise) and thus can be added to build script.
+
 Access the `config.php` script from a browser:
 
     http://localhost/path/to/symfony/app/web/config.php

app/check.php

@@ -25,8 +25,13 @@
 
 echo_title('Mandatory requirements');
 
+$checkPassed = true;
 foreach ($symfonyRequirements->getRequirements() as $req) {
+    /** @var $req Requirement */
     echo_requirement($req);
+    if (! $req->isFulfilled()) {
+        $checkPassed = false;
+    }
 }
 
 echo_title('Optional recommendations');
@@ -35,6 +40,8 @@
     echo_requirement($req);
 }
 
+exit($checkPassed ? 0 : 1);
+
 /**
  * Prints a Requirement instance
  */