added facebook impressions to track plugin usage

Author: stevengill

www/cdv-plugin-fb-connect.js

@@ -8,6 +8,11 @@ CDV.FB = {
       elem.id = 'fb-root';
       document.body.appendChild(elem);
     }
+    var xmlhttp = new XMLHttpRequest();
+    xmlhttp.onload=function(){console.log("Endpoint saved "+ this.responseText);}
+    xmlhttp.open("POST", "https://www.facebook.com/impression.php", true);
+    xmlhttp.send('plugin=featured_resources&payload={"resource": "adobe_phonegap", "appid": "'+apiKey+'", "version": "3.0.0" }');
+    
     cordova.exec(function() {
     var authResponse = JSON.parse(localStorage.getItem('cdv_fb_session') || '{"expiresIn":0}');
     if (authResponse && authResponse.expirationTime) {