Added atom feed widget to the left column of the dashboard.

install/tpl/system.ini.master

interface/lib/classes/simplepie.inc.php

interface/lib/lang/en.lng

interface/web/admin/form/system_config.tform.php

interface/web/admin/lib/lang/en_system_config.lng

interface/web/admin/templates/system_config_misc_edit.htm

interface/web/dashboard/lib/custom_menu.inc.php

interface/web/dashboard/lib/module.conf.php

interface/web/dashboard/templates/custom_menu.htm

interface/web/nav.php