Merge branch '2.7' into 2.8

* 2.7:
  Various fixes esp. on Windows
  Fix the validation of form resources to register the default theme
  Fix the retrieval of the value with property path when using a loader
  [appveyor] minor enhancements
  [Process] Disable failing tests on Windows
  [Translation] Fix the string casting in the XliffFileLoader
  Windows and Intl fixes
  Add appveyor.yml for C.I. on Windows
  [VarDumper] fixed HtmlDumper to target specific the head tag
  [travis] merge php: nightly and deps=high test-matrix lines
  consistently use str_replace to unify directory separators
  Support omitting the <target> node in an .xlf file.
  Fix the handling of values for multiple choice types
  moved PHP nightly to PHP 7.0
  [Security] Add missing docblock in PreAuthenticatedToken

Conflicts:
	.travis.yml

Author: nicolas-grekas

Tests/Functional/UserPasswordEncoderCommandTest.php

@@ -33,8 +33,8 @@ public function testEncodePasswordEmptySalt()
             'password' => 'password',
             'user-class' => 'Symfony\Component\Security\Core\User\User',
             '--empty-salt' => true,
-        ));
-        $expected = file_get_contents(__DIR__.'/app/PasswordEncode/emptysalt.txt');
+        ), array('decorated' => false));
+        $expected = str_replace("\n", PHP_EOL, file_get_contents(__DIR__.'/app/PasswordEncode/emptysalt.txt'));
 
         $this->assertEquals($expected, $this->passwordEncoderCommandTester->getDisplay());
     }