title: org.svenson.JSONProperty to exclude dynamically properties
body: <p>I have a Java app working with CouchDB. For parsing JSON from it, I use lib: <strong>com.google.code.svenson v.1.3.8</strong>
  But, I've got a problem. I receive JSON, and one property in it I want to exclude. Example:</p>
  
  <pre><code>{"groups":[], "norms":[], "unit":null, "_attachments":{
      "revision/1-b7c9e44edecb4c6509ce75d84d3aa06d":{
          "content_type":"application/json",
          "revpos":2,
          "digest":"md5-qPtWsDPF7vQANTQvQzmjrA==",
          "length":684,
          "stub":true
      }
  }}
  </code></pre>
  
  <p>I need to exclude <strong>"_attachments"</strong> field and all inners. But problem is, that property <strong>revision</strong> is dynamically. It changes all time. And my code doesn't work: </p>
  
  <pre><code>public class TestDTO {
  
      private String attachment;
      private String revision;
      private String contentType;
      private String revpos;
      private String digest;
      private String length;
      private String stub;
  
      @JSONProperty(ignore = true, value = "_attachments")
      public void setAttachment(String attachment) {
          this.attachment = attachment;
      }
  
      public String getRevision() {
          return revision;
      }
  
      @JSONProperty(ignore = true, value = "revision/")
      public void setRevision(String revision) {
          this.revision = revision;
      }
  //other get/set methods 
  }
  </code></pre>
  
  
  
  <pre><code>org.svenson.JSONParseException: Cannot set property revision/1-d009693fd000f179495cb3f9087109b6 on class java.lang.String
      at org.svenson.JSONParser.parseObjectInto(JSONParser.java:589)
      at org.svenson.JSONParser.parseObjectInto(JSONParser.java:617)
      at org.svenson.JSONParser.parse(JSONParser.java:396)
      at org.svenson.JSONParser.parse(JSONParser.java:341)
      at com.foo.core.api.services.bar.BarObjectParser.parseToObject(BarObjectParser.java:47)
      at com.foo.core.api.services.bar.task.ChangesProcessorTask.persistObject(ChangesProcessorTask.java:78)
      at com.foo.core.api.services.bar.task.ChangesProcessorTask.processChange(ChangesProcessorTask.java:65)
      at com.foo.core.api.services.bar.task.ChangesProcessorTask.processChanges(ChangesProcessorTask.java:46)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273)
      at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:264)
      at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
      at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
      at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
  </code></pre>