* 2.7:
use HHVM 3.15 to run tests
[TwigBridge] fix Twig 2.x compatibility
removed some PHP CS Fixer rules
Improve language
[Console] SymfonyStyle: Escape trailing backslashes in user texts
Mention the community review guide
[Form] fix group sequence based validation
[Console] Fix question formatting using SymfonyStyle::ask()
* 2.7:
[Console] Review Application docblocks
bumped Symfony version to 2.7.23
updated VERSION for 2.7.22
update CONTRIBUTORS for 2.7.22
updated CHANGELOG for 2.7.22
Update PHP CS Fixer config file