move javadoc comments above the interface definition to make it visible

Fix #670

src/main/java/org/json/JSONPropertyIgnore.java

@@ -11,13 +11,13 @@ import java.lang.annotation.Documented;
 import java.lang.annotation.Retention;
 import java.lang.annotation.Target;
 
-@Documented
-@Retention(RUNTIME)
-@Target({METHOD})
 /**
  * Use this annotation on a getter method to override the Bean name
  * parser for Bean -> JSONObject mapping. If this annotation is
  * present at any level in the class hierarchy, then the method will
  * not be serialized from the bean into the JSONObject.
  */
+@Documented
+@Retention(RUNTIME)
+@Target({METHOD})
 public @interface JSONPropertyIgnore { }