Add test config, CS rules and fix CS

.travis.yml

@@ -0,0 +1,27 @@
+language: php
+
+php:
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
+
+# This triggers builds to run on the new TravisCI infrastructure.
+# See: http://docs.travis-ci.com/user/workers/container-based-infrastructure/
+sudo: false
+
+matrix:
+  include:
+    - php: 5.5
+      env: 'COMPOSER_FLAGS="--prefer-stable --prefer-lowest"'
+
+before_script:
+  - travis_retry composer self-update
+  - travis_retry composer update ${COMPOSER_FLAGS} --no-interaction --prefer-source
+
+script:
+  - vendor/bin/phpcs --standard=psr2 src/
+  - vendor/bin/phpunit --coverage-text --coverage-clover=coverage.clover
+
+after_script:
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' && $TRAVIS_PHP_VERSION != '7.0' ]]; then php vendor/bin/ocular code-coverage:upload --format=php-clover coverage.clover; fi