updated CHANGELOG for 2.3.12
update CONTRIBUTORS for 2.3.12
updated VERSION for 2.3.12
bumped Symfony version to 2.3.13
updated CHANGELOG for 2.4.3
updated VERSION for 2.4.3
bumped Symfony version to 2.4.4
Merge branch '2.3' into 2.4

* 2.3:
  bumped Symfony version to 2.3.13
  updated VERSION for 2.3.12
  update CONTRIBUTORS for 2.3.12
  updated CHANGELOG for 2.3.12

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php
Merge branch '2.4'

* 2.4:
  bumped Symfony version to 2.4.4
  updated VERSION for 2.4.3
  updated CHANGELOG for 2.4.3
  bumped Symfony version to 2.3.13
  updated VERSION for 2.3.12
  update CONTRIBUTORS for 2.3.12
  updated CHANGELOG for 2.3.12

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php