www/inc/google_plus_api.inc.php: Added, backup ...
www/common/comments_iframe.php: Same as before but using Google+ API
www/common/comments_iframe.php: Avatars added ...
Google API's: quotaUser added to requests ...
Comments: Towards replies of comments ...
Merge pull request #36 from NochEinDirk/my-contribution

Comments is using Google+ API => Avatars ...