Update Resources.php

To get this to work with sonnb's addon to show resource's thumbnail instead of default author's avatar
Merge pull request #1 from xfrocks/master

merged from xfrocks/bdWidgetFramework
Merge branch 'master' of https://github.com/quantnet/bdWidgetFramework

Conflicts:
	library/WidgetFramework/WidgetRenderer/XFRM/Resources.php