translatng declaraton tool

[Roger Gregory <roger@xxxxxxxx>]

whpped up a trval but extremely useful tool for oger today.

SomeClass declarationCandidates

returns the list of messages implemented in more than one subclass of
SomeClass but not n SomeClass.  These might be thngs that should be
declared subclassResponsbilty.  A message 'deepDeclarationCandidates'
does the same while checking all subclasses transitively.

This will be in the next release.

dean