Revision history for Path-Resolver

2.003     2009-04-29
          dump exceptions for now; this clearly needs design work

2.002     2009-04-29
          simplify some semantics; this still needs testing; specifically,
          relative-versus-absolute (should be the same) and what to do on
          various errors

2.001     2009-04-28
          add Hash resolver

2.000     2009-03-09
          add AnyDist resolver for arbitrary ShareDirs

1.000     2009-02-24
          initial release