* 2.2:
bumped Symfony version to 2.2.3-DEV
updated VERSION for 2.2.2
updated CHANGELOG for 2.2.2
removed CHANGELOG for 2.1
updated VERSION for 2.1.11
update CONTRIBUTORS for 2.1.11
updated CHANGELOG for 2.1.11
Conflicts:
src/Symfony/Component/HttpKernel/Kernel.php