Bump version number to 0.4.0.0
Bump version number to 0.4.0.0

New fields were added to the encoding options record.

tibbe/cassava,hvr/cassava,bgamari/cassava,bergmark/cassava,ahodgen/cassava,richardfergie/cassava,treeowl/cassava,jb55/cassava,psibi/cassava