Bundle update + redcarpet.
Enhance and correct .kaos export.
Add support for obstacles and predicates in the model.
Allow nil elements in quoting.
Extend meta-model.
Export -> Exporter + WebReport exporter.
Enhance dot export through graphviz attributes.
Use Ralation::DUM as default values for relation-valued attributes.
Add setter as well for Typed's attributes and put coercion there.
Add Typed#dup.
Add a selection tool.
Fix .kaos export when multiple refinedby, assignedto exist.
Fail when images do not exist.
Add an importer for .kaos files.
Add a json exporter.
Add export options to main command
Add support for domain descriptions in dot export.
Synchronize to last meta-model.
Fix .kaos export for use of the last meta-model
Fix details in import/export features.