Remove the `Chaos` basic action after a discussion with JCPWoodcock at
the June convergence workshop.
Kill an old (outdated) directory of the CML0 grammar in MediaWiki format
Merge commit '4fef4b885d7b6885b69bde88bea3d07b206b1d82' into jwc/base
Merge remote-tracking branch 'origin/development' into ldc/astntrw
Integrate new factory-based TypeComarator.
Rename ref helper

It's outside the assistant system so it should have a different name.
Also embedded a new CmlAssistantFactory since it's needed to cope with
the new TypeComparator.
Replace static TypeComp calls with factory uses.