Add TravisCI and Coveralls config

.coveralls.yml

@@ -0,0 +1,2 @@
+service_name: travis-ci
+src_dir: src

.travis.yml

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+sudo: false
+
+language: php
+
+php:
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
+
+before_script:
+  - if [[ "$TRAVIS_PHP_VERSION" == '5.6' ]]; then composer require satooshi/php-coveralls:dev-master squizlabs/php_codesniffer:2.* -n ; fi
+  - if [[ "$TRAVIS_PHP_VERSION" != '5.6' ]]; then composer install -n ; fi
+
+script:
+  - if [[ "$TRAVIS_PHP_VERSION" == '5.6' ]]; then mkdir -p build/logs && phpunit --coverage-clover build/logs/clover.xml ; fi
+  - if [[ "$TRAVIS_PHP_VERSION" != '5.6' ]]; then phpunit ; fi
+  - if [[ "$TRAVIS_PHP_VERSION" == '5.6' ]]; then vendor/bin/phpcs --standard=PSR2 --ignore=vendor/* -n -p . ; fi
+
+after_script:
+  - if [[ "$TRAVIS_PHP_VERSION" == '5.6' ]]; then php vendor/bin/coveralls -v ; fi