Travis again

Author: hadim

.travis.yml

@@ -5,5 +5,11 @@ cache:
   directories:
     - '$HOME/.m2/repository'
 
+# Needed to execute some notebooks
+before_script:
+  - "export DISPLAY=:99.0"
+  - "sh -e /etc/init.d/xvfb start"
+  - sleep 3  # give xvfb some time to start
+
 install: ".travis/build.sh"
 script: ".travis/test.sh"