[update 2.0] #20241

20241
-----

Issue 6498: Remove old events in favor of System announcements - Step 1
        http://code.google.com/p/pharo/issues/detail?id=6498
       
Issue 6476: one Monticello package that should not be there
        http://code.google.com/p/pharo/issues/detail?id=6476
       
Issue 6505: hasUnacceptedEdits breaks the debugger
        http://code.google.com/p/pharo/issues/detail?id=6505
       
Issue 6508: Tests.Release.ReleaseTest.testMethodsWithUnboundGlobals
        http://code.google.com/p/pharo/issues/detail?id=6508