use g-d-m 3.1.3.RELEASE version

Author: lhotari

build.gradle

@@ -30,7 +30,7 @@ ext {
     commonsCollectionsVersion = "3.2.1"
     commonsIOVersion = "2.2"
     commonsLangVersion = "2.6"
-    datastoreVersion = "3.1.3.BUILD-SNAPSHOT"
+    datastoreVersion = "3.1.3.RELEASE"
     gantVersion = "1.9.6"
     gdocEngineVersion = "1.0.1"
     groovyVersion = "2.1.9"