title: Property FirebasePlugin does not exist on type 'window'
body: <p>Im using the cordova-firebase-plugin in my ionic2 project
  Im using it for firebase analytics. </p>
  
  <p>In my typeScript file when i try to call the function </p>
  
  <pre><code>window.FirebasePlugin.logEvent("page_view", {page: "Event List"});
  </code></pre>
  
  <p>I get the error </p>
  
  <pre><code>Property FirebasePlugin does not exist on type 'Window'
  </code></pre>
  
  <p>I guess that i have to import it. Ive already added it to my project by running the command</p>
  
  <pre><code>cordova plugin add cordova-plugin-firebase@0.1.10 --save
  </code></pre>
  
  <p>And i cant find any reference to how to add this. Any help and I would be grateful</p>
  
  <p><a href="https://www.npmjs.com/package/cordova-plugin-firebase" rel="nofollow">https://www.npmjs.com/package/cordova-plugin-firebase</a></p>