Yes it can be added but it requires some coding in order to do so. The code for the social widget can be found in widgets/rf_contact_widget.php in the theme folder. The social icons are on line #55 to #59. You can simply put the required html there.
To add social buttons to the top of the page you need to modify the code in the header.php file. You can for example put the code in the tagline div on line #74. Just copy/paste the code Facebook and Google give you for the share buttons on their website.