Improved S3Resource.extract() (needs integration testing before using in
production!), S3Report: less fields in the initial join (don't
automatically use list_fields), several bug fixes.
Fix S3ResourceField.resolve for _id/id equivalence.
Merge branch 'master' of git://github.com/flavour/eden
Merge branch 'master' of git://github.com/flavour/eden
Merge branch 'master' of git://github.com/nursix/eden