[update 2.0] #20237

20237
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Issue 6451: New version of Spec
        http://code.google.com/p/pharo/issues/detail?id=6451
       
Issue 5661: Clean morphic EventHandler
        http://code.google.com/p/pharo/issues/detail?id=5661
       
Issue 6454: UndeclaredVariableWarning does not show location
        http://code.google.com/p/pharo/issues/detail?id=6454
       
 Issue 6455: New version of CI
        http://code.google.com/p/pharo/issues/detail?id=6455

Issue 6471: Remove RMockSystemAnnouncer
        http://code.google.com/p/pharo/issues/detail?id=6471
       
 Issue 6473: update comment in vm parameterAt:
        http://code.google.com/p/pharo/issues/detail?id=6473
       
Issue 6474: Improve senders
        http://code.google.com/p/pharo/issues/detail?id=6474