title: json-schema-validator custom message
body: <p>I am using json-schema-validator2.2.6 library to validate my json against json schema. The problem is that it gives generic error messages that are not relevant to me. I want to send custom message or code to user.</p>
  
  <p>Do we have any option like this :</p>
  
  <pre><code>"properties": {
          "myKey": {
              "type": "string"
              **"errorMessage" : "My error message"**
          },
  }
  </code></pre>
  
  <p>Or any other way by which I can provide custom error message?</p>