WL-3501 Add solo-citation plugin
WL-3501 Add researcher training tool plugin
WL-3501 Add oxpoints plugin
WL-3501 Add oxitems plugin
WL-3501 Add oxam plugin
WL-3501 Add image gallery plugin
WL-3501 Add folder-listing plugin
WL-3501 Add creative-commons-images plugin
WL-3501 Add common and common-wl directories (for common code)