Merge pull request #45 from kazoni/master

Fix gradle error

Author: Matt Bernier

.travis.yml

@@ -2,7 +2,7 @@ language: java
 sudo: false
 jdk:
 - oraclejdk8
-- openjdk7
+- openjdk8
 after_script:
 - "./gradlew build"
 - "./scripts/s3upload.sh"