Merge branch '2.7' into 2.8

* 2.7:
  [Locale] Fix Intl requirement
  Better Iban Validation

Conflicts:
	src/Symfony/Component/Locale/composer.json
	src/Symfony/Component/Validator/Constraints/Iban.php

Author: nicolas-grekas

composer.json

@@ -29,8 +29,8 @@
         "symfony/css-selector": "~2.0,>=2.0.5|~3.0.0",
         "symfony/dependency-injection": "~2.6,>=2.6.6|~3.0.0",
         "symfony/dom-crawler": "~2.0,>=2.0.5|~3.0.0",
-        "symfony/form": "~2.7",
-        "symfony/framework-bundle": "~2.7",
+        "symfony/form": "~2.8",
+        "symfony/framework-bundle": "~2.8",
         "symfony/http-foundation": "~2.4|~3.0.0",
         "symfony/twig-bundle": "~2.7|~3.0.0",
         "symfony/twig-bridge": "~2.7|~3.0.0",