[READ-ONLY] Subtree split of the Symfony EventDispatcher Component
Latest commit 5382f4c Jul 19, 2016 @fabpot fabpot Merge branch '3.1'
* 3.1:
  fixed bad merge
  Fix PHP 7.1 related failures
  [VarDumper] Fix for 7.1
  fixed CS
  Added class existence check if is_subclass_of() fails in compiler passes
  Fix the DBAL session handler version check for Postgresql