[Cuis-dev] Behavior hierarchy type error fixes

[Hernan Wilkinson]

Hi,
 attached is a changeset that fixes some errors detected by the LiveTyping
type checker and some new tests.
 Most of them include sending messages to variables that could be nil or
missing #subclassResposibility and so on.

 There are a couple of methods in Behavior where the solution was to define
a message as subclassResponsibility or to push down the method. I decided
to push down the methods.

 Cheers!
 Hernan.


-- 

*Hernán WilkinsonAgile Software Development, Teaching & Coaching*
*Phone: +54-011*-4893-2057
*Twitter: @HernanWilkinson*
*site: http://www.10Pines.com <http://www.10pines.com/>*
Address: Alem 896, Floor 6, Buenos Aires, Argentina
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