ConfigurationOfMetacelloPreview 1.0.0-beta.32.7 release

-synchronize with current Metacello 1.0-beta.32.1
- fix Issue #172: Metacello-Base bootstrap code and configurations should reference seaside.gemtalksystems.com repos
  https://github.com/dalehenrich/metacello-work/issues/172
add pharo2.0 to lineup ... intend to address Phaor02.0 issues before finished