Merge pull request #186 from demarey/configuration

Use Metacello-Platform.pharo30
enable pharo-3.0
add Metacello-Platform.pharo30-ChristopheDemarey.1 to 1.0-beta.32.1 spec for Pharo3.0
use Metacello-Platform.pharo30-ChristopheDemarey.2
preparing to release Metacello 1.0-beta.31.1.8
release 1.0.0-beta.32.9

- fix Issue #188: Problems using <version:imports:> for structural reasons
  https://github.com/dalehenrich/metacello-work/issues/188
make 1.0.0-beta.32.9 the stable version