Version 0.2: The frozen info starts with 'FrT;'. Warning if not - nonfatal. Results of freezeEmpty are cached, explanation about caching FreezeEmpty added. At last, all the tests are OK. Little bit more compact backreferences. Version 0.2: New tests added and work. "Repeated" handled much cleaner now (basing on $secondpass). Packages are stored in a more compact form. Numbers are stored in a more compact form. Version 0.4: Can handle overloaded objects. Version 0.41: Bug in detecting duplicated overloaded objects fixed. (When Reissued:) Remove wrong comments on faking out tests in t/*. Add a POD section on limitations.