- Added implementation for Enum and Map

- Moving the CustomClass to data folder.
- Removing JSONBuilder.java
- Moving the implementation of JSONBuilder to JSONObject.

src/test/java/org/json/junit/data/CustomClassD.java

@@ -0,0 +1,19 @@
+package org.json.junit.data;
+
+import java.util.List;
+
+public class CustomClassD {
+  public List<String> stringList;
+
+  public CustomClassD() {}
+  public CustomClassD(List<String> stringList) {
+    this.stringList = stringList;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    CustomClassD classD = (CustomClassD) o;
+    return this.stringList.equals(classD.stringList);
+  }
+}
+