feature #477 Update to Symfony 3.2.4 and start supporting Twig 2 (bocharsky-bw)

This PR was squashed before being merged into the master branch (closes #477).

Discussion
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Update to Symfony 3.2.4 and start supporting Twig 2

Symfony SE already do it: symfony/symfony-standard#1045

  - Updating symfony/symfony (v3.2.3 => v3.2.4) Downloading: 100%
  - Installing ircmaxell/password-compat (v1.0.4) Loading from cache
  - Installing symfony/polyfill-php55 (v1.3.0) Loading from cache
  - Updating sensio/framework-extra-bundle (v3.0.21 => v3.0.22) Downloading: 100%
  - Updating white-october/pagerfanta-bundle (v1.0.7 => v1.0.8) Downloading: 100%
  - Updating friendsofphp/php-cs-fixer (v2.0.0 => v2.1.0) Downloading: 100%
  - Updating symfony/phpunit-bridge (v3.2.3 => v3.2.4) Loading from cache
  - Updating doctrine/dbal (v2.5.11 => v2.5.12) Loading from cache
  - Updating swiftmailer/swiftmailer (v5.4.5 => v5.4.6) Downloading: 100%

Commits
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b6e7c78 Update to Symfony 3.2.4 and start supporting Twig 2

Author: javiereguiluz

composer.json

@@ -27,7 +27,7 @@
         "symfony/swiftmailer-bundle"           : "^2.3",
         "symfony/symfony"                      : "^3.2",
         "twig/extensions"                      : "^1.3",
-        "twig/twig"                            : "^1.28",
+        "twig/twig"                            : "^1.28 || ^2.0",
         "white-october/pagerfanta-bundle"      : "^1.0"
     },
     "require-dev": {