Issue #72: try bootstrapping from explicit Metacello commit (bypassing ConfigurationOfMetacelloPreview) and see where that gets us
Issue #72 ... update SHA of Metacello commit
Issue #72, now reference config_dev branch now
Issue #72: oops ... need to use MetacelloPreview _configuration_ now with config_dev branch
Issue #72: oops ... fix repo reference...
Issue #72: enable Pharo4.0
Merge branch 'dev'