Tell Travis to tell Gitter about failed (and fixed) builds.

Author: fabacab

.travis.yml

@@ -31,3 +31,11 @@ before_script:
   - bash bin/install-wp-tests.sh wordpress_test root '' localhost $WP_VERSION 
 
 script: phpunit
+
+notifications:
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/ac559b8d8fd5527c8e95
+    on_success: change
+    on_failure: always
+    on_start: never