[Pharo-project] [update 2.0] #20297

[Esteban Lorenzano]

20297
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Issue 6639:     FileSystem enhancements
        http://code.google.com/p/pharo/issues/detail?id=6639
        
Issue 6695:     RPackageSet speedup
        http://code.google.com/p/pharo/issues/detail?id=6695
        
Issue 6700:     missing method in RPackageSet
        http://code.google.com/p/pharo/issues/detail?id=6700