Add references in docs
Add references in docs

hvr/cassava,jb55/cassava,edtsech/cassava,ahodgen/cassava,solidsnack/cassava,meiersi/cassava,psibi/cassava,bergmark/cassava,sjoerdvisscher/cassava,bgamari/cassava,basvandijk/cassava,tibbe/cassava,richardfergie/cassava,treeowl/cassava