Updated testing process

.travis.yml

@@ -1,3 +1,18 @@
 language: node_js
 node_js:
   - '4.4.4'
+addons:
+  apt:
+    packages:
+      - xvfb
+install:
+  - export DISPLAY=':99.0'
+  - Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
+notifications:
+  email: false
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/0f214eb0d0017d3c5561
+    on_success: change  # options: [always|never|change] default: always
+    on_failure: always  # options: [always|never|change] default: always
+    on_start: never     # options: [always|never|change] default: always