This release changes the format of the API Blueprint AST in a backward-incompatible way. MSON data structures and attributes are now represented by the Refract Data Structure Namespace instead of the MSON-AST. As such, any code using the MSON-AST will need to be updated to use the new Refract elements.
Additionally, mimetypes have been updated to remove the raw and html components. For example, application/vnd.apiblueprint.parseresult.raw+json is now just application/vnd.apiblueprint.parseresult+json.