Fix gradle build

Author: David Staheli

.gitignore

@@ -1,6 +1,9 @@
 # Compiled class file
 *.class
 
+# Gradle
+.gradle/
+
 # Log file
 *.log
 

build.gradle

@@ -14,5 +14,5 @@ repositories {
 }
 
 dependencies {
-    testCompile group: 'junit', name: 'junit', version:'5.2'
+    testCompile group: 'junit', name: 'junit', version:'4.11'
 }