Merge pull request #10 from zalando/issue9

Fix issue 9 (travis build was failing)

Author: valgog

.travis.yml

@@ -1,11 +1,15 @@
 language: java
 jdk:
     - openjdk7
-    - openjdk8
     - oraclejdk7
     - oraclejdk8
 addons:
     postgresql: "9.3"
 
 # go faster on travis
 sudo: false
+
+# stop mvn install from running
+install: true
+
+script: mvn -B -V package javadoc:javadoc test