variable length argument methods
and default argument values

because this would be really cool to have that in Squeak.
Ok of course this change the language but we could get rid of a lot of 
with:with:with: methods.


I also thought recently that something really missing in Smalltalk is
dictionary like classes
	because we have named fixed attributes, variables unamed attributes
	but often I would like to have variables (dictionary-based) attributes.

Stef