[Pharo-project] [update 2.0] #20301

2.0.20301 --------- The following changes have been integrated: Issue 6728: infinite recursion on startup preferences. http://code.google.com/p/pharo/issues/detail?id=6728 Issue 6723: Improve Collection Streaming http://code.google.com/p/pharo/issues/detail?id=6723 Issue 6715: RPackageSet is not backwards compatible http://code.google.com/p/pharo/issues/detail?id=6715