Added the Travis CI configuration file

.travis.yml

@@ -0,0 +1,42 @@
+language: php
+sudo: false
+
+env:
+  global:
+    - deps="no"
+    - SYMFONY_VERSION=""
+
+matrix:
+  fast_finish: true
+  include:
+    - php: 5.3
+    - php: 5.3
+      env: deps="low"
+    - php: 5.4
+    - php: 5.5
+    - php: 5.6
+    - php: 5.6
+      env: SYMFONY_VERSION="2.3.x"
+    - php: 5.6
+      env: SYMFONY_VERSION="2.6.x"
+    - php: 5.6
+      env: SYMFONY_VERSION="2.7.x"
+    - php: 5.6
+      env: SYMFONY_VERSION="2.8.x-dev"
+    - php: hhvm
+    - php: nightly
+  allow_failures:
+    - php: hhvm
+    - php: nightly
+    - env: SYMFONY_VERSION="2.7.x-dev"
+    - env: SYMFONY_VERSION="2.8.x-dev"
+
+before_install:
+  - if [ "$SYMFONY_VERSION" != "" ]; then composer require --dev --no-update symfony/symfony:$SYMFONY_VERSION; fi
+
+install:
+  - if [ "$deps" = "low" ]; then composer update --prefer-lowest; fi
+  - if [ "$deps" != "low" ]; then composer install; fi
+
+script:
+  - phpunit -c app