Fix Foursquare handler name/avatar grabbing

 * Some redirects were causing odd behavior when pulling down
 http://foursquare.com/user, so now just use / instead of /user

xpi/handlers/foursquare.js

@@ -2,6 +2,7 @@
 //   Eric Butler <eric@codebutler.com>
 register({
   name: 'Foursquare',
+  url: 'http://foursquare.com/',
   domains: [ 'foursquare.com' ],
   sessionCookieNames: [ 'ext_id', 'XSESSIONID' ],
 
@@ -11,15 +12,19 @@ register({
   },
 
   identifyUser: function () {
-    var resp = this.httpGet('http://foursquare.com/user');
+    var resp = this.httpGet(this.siteUrl);
     var path = resp.request.channel.URI.path;
     var userId = path.split('/')[2];
 
+    // Maybe this is useful for something in the future..?
     this.userId = userId;
-    this.userName   = resp.body.querySelectorAll('.withImage a')[1].innerHTML
-    this.userAvatar = resp.body.querySelector('.withImage img').src;
+
+    // Get image object for user avatar (contains their name, too!)
+    var user_img = resp.body.querySelector('.withImage img');
+    this.userName = user_img.alt;
+    this.userAvatar = user_img.src;
     if (this.userAvatar.substr(0, 4) != 'http') {
       this.userAvatar = 'http://foursquare.com/' + this.userAvatar;
     }
   },
-});
+});