update Gradle wrapper to 2.8

build.gradle

@@ -70,7 +70,7 @@ subprojects {
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '2.3'
+    gradleVersion = '2.8'
 }
 
 //Task used by Heroku for staging

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Mon Oct 05 14:46:21 CEST 2015
+#Thu Nov 05 08:42:18 CET 2015
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.8-bin.zip

gradlew

@@ -56,9 +56,9 @@ while [ -h "$PRG" ] ; do
     fi
 done
 SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >&-
+cd "`dirname \"$PRG\"`/" >/dev/null
 APP_HOME="`pwd -P`"
-cd "$SAVED" >&-
+cd "$SAVED" >/dev/null
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar