- Factored out the code to select all unswapped (ie., non-shallow) objects in   the objectspace.
- Factored out the code to select all unswapped (ie., non-shallow) objects in
  the objectspace.

- Added a read-accessor for the active objects hash.

--HG--
extra : convert_revision : svn%3A39a105f4-52d6-0310-bb1b-d6517044f2e4/trunk%40805

ged/mues