Fix JSON errors (added json-simple library)

Author: njb-said

pom.xml

@@ -30,6 +30,13 @@
             <artifactId>guava</artifactId>
             <version>18.0</version>
         </dependency>
+
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1</version>
+            <scope>compile</scope>
+        </dependency>
     </dependencies>
 
     <build>