title: Cordova Plugin filepickerIo API Key is Missing
body: <p>I've used cordova plugin filepickerio but after I implemented it. It shows me "API Key" is missing. May I know how to get API Key for cordova plugin filepicker io.</p>
  
  <p>I tried to create a key at my own but the issue was still exist. I'm not sure if the key was provided by the plugin or I am the who will create a key.</p>
  
  <p>Here's my code:</p>
  
  <pre><code>        window.filepicker.setKey('l5uQ3k7FQ5GoYCHyTdZV');
          window.filepicker.setName('MyApp');
          window.filepicker.pick({
              multiple: true,
              mimeTypes: ['image/*', 'application/pdf'],
              services : [ 'CAMERA', 'GALLERY', 'GOOGLE_DRIVE', 'DROPBOX', 'BOX', 'SKYDRIVE'],
              maxFiles: 20,
              maxSize: (10*1024*1024)
          }, function(res) {
              console.log(res);
          }, function(e) {
             console.error(e);
          });
  </code></pre>