Issue #2270551 : Allow $this as data type in @return docs.
Issue #2203627 by TravisCarden: Fixed "Implements hook_foo() for some-template.file" sniff doesn't support Twig template names.

Conflicts:
	coder_sniffer/Drupal/Sniffs/Commenting/FunctionCommentSniff.php
Issue #2220833 by psynaptic: Added an option to allow "Implementation of..." for hook documentation.
Switched the hook docblock check to non-strict mode.
Added vendor dir and lock file.
Removed php_codesnifffer.
Added php_codesniffer.