title: Cordova NFC Plugin working but raises no event
body: <p>I am using the phonegap-nfc plugin to read NFC tags in my cordova app. I also included the uses-permission tags in the AndroidManifest.xml.
  My Typescript-Code is:</p>
  
  <pre><code>module myapp.nfcRead {
  
  export class NfcCtrl {
      private status:string;
  
      constructor(private $cordovaNfc:any, private $cordovaNfcUtil:any) {
          this.status = "nfc";
      }
  
      public readNFC() {
          console.log("trying to find nfc");
          this.$cordovaNfc.then((nfcInstance:any) =&gt; {
              nfcInstance.addNdefListener((nfcEvent:any) =&gt; {
                  this.status = "NFC Detected";
              })
                  .then(
                  //Success callback
                  (event:any) =&gt; {
                      this.status = "Reading NFC";
                      console.log("Reading NFC");
                  },
                  //Fail callback
                  (err:any) =&gt; {
                      this.status = "error";
                      console.log("error");
                  });
          });
          this.$cordovaNfcUtil.then((nfcUtil:any) =&gt; {
              this.status = nfcUtil.bytesToString("some bytes");
          });
      }
  }
  
  NfcCtrl.$inject = ['$cordovaNfc', '$cordovaNfcUtil'];
  angular.module('myapp.nfcRead', ['ngCordova.plugins.nfc']).controller('NfcCtrl', NfcCtrl);}
  </code></pre>
  
  <p>If i start the App in the browser and i call the method "readNFC()" the status remains "nfc". If i deploy the app on my android phone and i call the "readNFC()"-function and NFC is disabled, the status is "error". After activating NFC and calling the function again, it says "Reading NFC". Now i want to read NFC tags, but the status doesn't change. (no event is raised)</p>
  
  <p>I downloaded an app from the Google Play Store to see if tags are discovered:
  (app: NFC Tools)
  <a href="http://i.stack.imgur.com/7pukB.png" rel="nofollow">NFC Tools output</a></p>
  
  <p>Do you have any tip for me?
  Thank you</p>