[Pharo-project] [update 2.0] #20569

[Marcus Denker]

20569
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Issue 7499:     Write a Pharo20.sources (code changes)
        http://code.google.com/p/pharo/issues/detail?id=7499


Diff information:
http://ss3.gemstone.com/ss/Pharo20/Traits-MarcusDenker.462.diff
http://ss3.gemstone.com/ss/Pharo20/System-Support-MarcusDenker.792.diff
http://ss3.gemstone.com/ss/Pharo20/Collections-Streams-MarcusDenker.131.diff