[update 2.0] #20026

20026
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Issue 5722: Be able to remove traits from class definition
        http://code.google.com/p/pharo/issues/detail?id=5722
       
Issue 5715: Enhance the Slice Maker so that is gets the issue title automatically
        http://code.google.com/p/pharo/issues/detail?id=5715
       
Issue 5580: MCOrganization unload correctly
        http://code.google.com/p/pharo/issues/detail?id=5580
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Marcus Denker -- http://marcusdenker.de