Composer: Require squizlabs/php_codesniffer
Travis: Run phpcs with PSR-2
Fix: Remove fabpot/php-cs-fixer
Fix: Update README-GIT.md

Remove note about adding Git pre-commit hook.

[skip ci]
Fix: Show phpcs summary report on Travis only

Full report is too long for Travis.
Fix: Use phpcs in GIT pre-commit hook
PHPCS Fixes for Zend\Authentication
PHPCS fixes for Zend\Barcode
PHPCS fixes for Zend\Cache
PHPCS fixes for Zend\Cache
PHPCS fixes for Zend\Captcha
PHPCS fixes for Zend\XmlRpc
PHPCS fixes for Zend\View
PHPCS fixes for Zend\Valiator
PHPCS fixes for Zend\Uri
PHPCS fixes for Zend\Text
PHPCS fixes for Zend\Tag
PHPCS fixes for Zend\Stdlib
PHPCS fixes for Zend\Test
PHPCS fixes for Zend\Soap