Lukas was kind enough to shed some light on the loading of rb and ob.
Having his permission, I'm reproducing the bulk of the message. It is as follows:
"Actually I just split the packages into more independent packages, I
didn't do any code changes lately. Some parts are going to be
integrated into the core of Pharo. You need to load all of them to get
the same system (and run the tests of course):
Gofer new
squeaksource: 'rb';
package: 'AST-Core';
package: 'AST-Semantic';
package: 'Refactoring-Core';
package: 'Refactoring-Changes';
package: 'Refactoring-Critics';
package: 'Refactoring-Environment';
package: 'Refactoring-Spelling';
load.
Note that the OB code in this repository is highly outdated. I am too
lazy to copy it over to Colin all the time.
Gofer new
renggli: 'omnibrowser';
package: 'OmniBrowser';
package: 'OB-Standard';
package: 'OB-Morphic';
package: 'OB-Shout';
package: 'OB-Refactory';
package: 'OB-Regex';
package: 'OB-SUnitIntegration';
load.
Gofer new
renggli: 'unsorted';
package: 'Shout';
package: 'ShoutWorkspace';
package: 'RoelTyper';
package: 'ECompletion';
package: 'ECompletionOmniBrowser';
load."
Chris