Merge pull request #663 from friederbluemle/update-gradle-wrapper

Update Gradle wrapper to 3.5

Author: samtstern

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
-#Sat Mar 04 16:24:17 SGT 2017
+#Tue Apr 11 20:44:47 SGT 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-all.zip