- tests/serialize.test: Added some basic regression tests, in particular to challenge the filter options provided by Serializer->deepSerialize() and Serializer->all(). - Included a test for commit 595e6a2. - Along the line, two minor issues where fixed: 1) Set Serializer->ignore() to public, otherwise the various external message sends to this method would fail; 2) Object-serialize() did not distinguish between serialising a per-object or per-class container properly; as a consequence, per-object containers were not restored at all. Add a test covering this.
