Add php-cs-fixer check.

.travis.yml

@@ -7,9 +7,13 @@ env:
 
 before_script:
   - pear install pear/PHP_CodeSniffer
+  - pear channel-discover pear.phing.info
+  - pear install phing/phing
+  - composer global require fabpot/php-cs-fixer
+  - export PATH="$HOME/.composer/vendor/bin:$PATH"
   - phpenv rehash
 
 script:
   - phpunit --stderr --configuration module/VuFind/tests/phpunit.xml
   - phpcs --standard=PEAR --ignore=*/config/*,*/tests/* --extensions=php $PWD/module
-
+  - phing php-cs-fixer-dryrun